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Finding the Fourth Proportional to 572,187.10, 858,280.65 and 472,459.90

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Solution

The fourth proportional to 572,187.10, 858,280.65 and 472,459.90 is: 708,689.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,187.10 : 858,280.65 = 472,459.90 : x
  2. Step 2: Convert to fraction form
    572,187.10/858,280.65 = 472,459.90/x
  3. Step 3: Cross multiply
    572,187.10x = 858,280.65 × 472,459.90
  4. Step 4: Simplify right side
    572,187.10x = 405,503,190,070.94
  5. Step 5: Solve for x
    x = 405,503,190,070.94/572,187.10
  6. Step 6: Final answer
    x = 708,689.85

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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.