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Finding the Fourth Proportional to 567,490.64, 783,142.32 and 312,850.92

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Solution

The fourth proportional to 567,490.64, 783,142.32 and 312,850.92 is: 431,737.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    567,490.64 : 783,142.32 = 312,850.92 : x
  2. Step 2: Convert to fraction form
    567,490.64/783,142.32 = 312,850.92/x
  3. Step 3: Cross multiply
    567,490.64x = 783,142.32 × 312,850.92
  4. Step 4: Simplify right side
    567,490.64x = 245,006,795,302.93
  5. Step 5: Solve for x
    x = 245,006,795,302.93/567,490.64
  6. Step 6: Final answer
    x = 431,737.16

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.