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Finding the Fourth Proportional to 321,512.66, 443,646.69 and 176,280.23

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Solution

The fourth proportional to 321,512.66, 443,646.69 and 176,280.23 is: 243,244.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,512.66 : 443,646.69 = 176,280.23 : x
  2. Step 2: Convert to fraction form
    321,512.66/443,646.69 = 176,280.23/x
  3. Step 3: Cross multiply
    321,512.66x = 443,646.69 × 176,280.23
  4. Step 4: Simplify right side
    321,512.66x = 78,206,140,551.94
  5. Step 5: Solve for x
    x = 78,206,140,551.94/321,512.66
  6. Step 6: Final answer
    x = 243,244.36

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Half scale
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Double scale
Find fourth proportional to 321,513.66, 443,648.07 and 176,281.23
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.