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Finding the Fourth Proportional to 698,864.79, 964,422.74 and 392,941.46

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Solution

The fourth proportional to 698,864.79, 964,422.74 and 392,941.46 is: 542,253.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,864.79 : 964,422.74 = 392,941.46 : x
  2. Step 2: Convert to fraction form
    698,864.79/964,422.74 = 392,941.46/x
  3. Step 3: Cross multiply
    698,864.79x = 964,422.74 × 392,941.46
  4. Step 4: Simplify right side
    698,864.79x = 378,961,673,708.33
  5. Step 5: Solve for x
    x = 378,961,673,708.33/698,864.79
  6. Step 6: Final answer
    x = 542,253.21

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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.