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Finding the Fourth Proportional to 674,387.17, 930,643.43 and 368,456.98

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Solution

The fourth proportional to 674,387.17, 930,643.43 and 368,456.98 is: 508,464.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,387.17 : 930,643.43 = 368,456.98 : x
  2. Step 2: Convert to fraction form
    674,387.17/930,643.43 = 368,456.98/x
  3. Step 3: Cross multiply
    674,387.17x = 930,643.43 × 368,456.98
  4. Step 4: Simplify right side
    674,387.17x = 342,902,063,021.42
  5. Step 5: Solve for x
    x = 342,902,063,021.42/674,387.17
  6. Step 6: Final answer
    x = 508,464.69

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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.