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Finding the Fourth Proportional to 653,398.40, 901,787.40 and 398,897.36

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Solution

The fourth proportional to 653,398.40, 901,787.40 and 398,897.36 is: 550,537.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,398.40 : 901,787.40 = 398,897.36 : x
  2. Step 2: Convert to fraction form
    653,398.40/901,787.40 = 398,897.36/x
  3. Step 3: Cross multiply
    653,398.40x = 901,787.40 × 398,897.36
  4. Step 4: Simplify right side
    653,398.40x = 359,720,613,141.26
  5. Step 5: Solve for x
    x = 359,720,613,141.26/653,398.40
  6. Step 6: Final answer
    x = 550,537.95

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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.