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Finding the Fourth Proportional to 661,456.76, 912,937.10 and 374,977.98

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Solution

The fourth proportional to 661,456.76, 912,937.10 and 374,977.98 is: 517,541.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,456.76 : 912,937.10 = 374,977.98 : x
  2. Step 2: Convert to fraction form
    661,456.76/912,937.10 = 374,977.98/x
  3. Step 3: Cross multiply
    661,456.76x = 912,937.10 × 374,977.98
  4. Step 4: Simplify right side
    661,456.76x = 342,331,307,750.17
  5. Step 5: Solve for x
    x = 342,331,307,750.17/661,456.76
  6. Step 6: Final answer
    x = 517,541.48

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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.