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Finding the Fourth Proportional to 676,072.08, 932,706.04 and 389,438.64

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Solution

The fourth proportional to 676,072.08, 932,706.04 and 389,438.64 is: 537,267.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,072.08 : 932,706.04 = 389,438.64 : x
  2. Step 2: Convert to fraction form
    676,072.08/932,706.04 = 389,438.64/x
  3. Step 3: Cross multiply
    676,072.08x = 932,706.04 × 389,438.64
  4. Step 4: Simplify right side
    676,072.08x = 363,231,771,737.39
  5. Step 5: Solve for x
    x = 363,231,771,737.39/676,072.08
  6. Step 6: Final answer
    x = 537,267.82

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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.