Home / 648,128.20-972,192.30-333,200.20

Finding the Fourth Proportional to 648,128.20, 972,192.30 and 333,200.20

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Solution

The fourth proportional to 648,128.20, 972,192.30 and 333,200.20 is: 499,800.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,128.20 : 972,192.30 = 333,200.20 : x
  2. Step 2: Convert to fraction form
    648,128.20/972,192.30 = 333,200.20/x
  3. Step 3: Cross multiply
    648,128.20x = 972,192.30 × 333,200.20
  4. Step 4: Simplify right side
    648,128.20x = 323,934,668,798.46
  5. Step 5: Solve for x
    x = 323,934,668,798.46/648,128.20
  6. Step 6: Final answer
    x = 499,800.30

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Half scale
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Double scale
Find fourth proportional to 648,129.20, 972,193.80 and 333,201.20
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.