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Finding the Fourth Proportional to 676,937.16, 934,266.56 and 390,450.96

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Solution

The fourth proportional to 676,937.16, 934,266.56 and 390,450.96 is: 538,876.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,937.16 : 934,266.56 = 390,450.96 : x
  2. Step 2: Convert to fraction form
    676,937.16/934,266.56 = 390,450.96/x
  3. Step 3: Cross multiply
    676,937.16x = 934,266.56 × 390,450.96
  4. Step 4: Simplify right side
    676,937.16x = 364,785,273,295.64
  5. Step 5: Solve for x
    x = 364,785,273,295.64/676,937.16
  6. Step 6: Final answer
    x = 538,876.12

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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.