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Finding the Fourth Proportional to 661,328.78, 912,705.08 and 374,818.10

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Solution

The fourth proportional to 661,328.78, 912,705.08 and 374,818.10 is: 517,289.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,328.78 : 912,705.08 = 374,818.10 : x
  2. Step 2: Convert to fraction form
    661,328.78/912,705.08 = 374,818.10/x
  3. Step 3: Cross multiply
    661,328.78x = 912,705.08 × 374,818.10
  4. Step 4: Simplify right side
    661,328.78x = 342,098,377,508.33
  5. Step 5: Solve for x
    x = 342,098,377,508.33/661,328.78
  6. Step 6: Final answer
    x = 517,289.42

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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.