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Finding the Fourth Proportional to 856,666.80, 1,283,866.20 and 456,445.80

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Solution

The fourth proportional to 856,666.80, 1,283,866.20 and 456,445.80 is: 684,064.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,666.80 : 1,283,866.20 = 456,445.80 : x
  2. Step 2: Convert to fraction form
    856,666.80/1,283,866.20 = 456,445.80/x
  3. Step 3: Cross multiply
    856,666.80x = 1,283,866.20 × 456,445.80
  4. Step 4: Simplify right side
    856,666.80x = 586,015,334,751.96
  5. Step 5: Solve for x
    x = 586,015,334,751.96/856,666.80
  6. Step 6: Final answer
    x = 684,064.49

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Double scale
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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.