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Finding the Fourth Proportional to 672,188.28, 927,420.84 and 400,038

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Solution

The fourth proportional to 672,188.28, 927,420.84 and 400,038 is: 551,934.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,188.28 : 927,420.84 = 400,038 : x
  2. Step 2: Convert to fraction form
    672,188.28/927,420.84 = 400,038/x
  3. Step 3: Cross multiply
    672,188.28x = 927,420.84 × 400,038
  4. Step 4: Simplify right side
    672,188.28x = 371,003,577,991.92
  5. Step 5: Solve for x
    x = 371,003,577,991.92/672,188.28
  6. Step 6: Final answer
    x = 551,934.02

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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.