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Finding the Fourth Proportional to 679,473,877.69, 937,659,254.38 and 393,377,468.77

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Solution

The fourth proportional to 679,473,877.69, 937,659,254.38 and 393,377,468.77 is: 542,852,398.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,473,877.69 : 937,659,254.38 = 393,377,468.77 : x
  2. Step 2: Convert to fraction form
    679,473,877.69/937,659,254.38 = 393,377,468.77/x
  3. Step 3: Cross multiply
    679,473,877.69x = 937,659,254.38 × 393,377,468.77
  4. Step 4: Simplify right side
    679,473,877.69x = 368,854,024,056,769,920
  5. Step 5: Solve for x
    x = 368,854,024,056,769,920/679,473,877.69
  6. Step 6: Final answer
    x = 542,852,398.26

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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.