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Finding the Fourth Proportional to 536,800.78, 740,678.61 and 307,430.92

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Solution

The fourth proportional to 536,800.78, 740,678.61 and 307,430.92 is: 424,193.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    536,800.78 : 740,678.61 = 307,430.92 : x
  2. Step 2: Convert to fraction form
    536,800.78/740,678.61 = 307,430.92/x
  3. Step 3: Cross multiply
    536,800.78x = 740,678.61 × 307,430.92
  4. Step 4: Simplify right side
    536,800.78x = 227,707,506,496.62
  5. Step 5: Solve for x
    x = 227,707,506,496.62/536,800.78
  6. Step 6: Final answer
    x = 424,193.70

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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.