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Finding the Fourth Proportional to 520,632.80, 781,392.54 and 371,239.10

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Solution

The fourth proportional to 520,632.80, 781,392.54 and 371,239.10 is: 557,174.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,632.80 : 781,392.54 = 371,239.10 : x
  2. Step 2: Convert to fraction form
    520,632.80/781,392.54 = 371,239.10/x
  3. Step 3: Cross multiply
    520,632.80x = 781,392.54 × 371,239.10
  4. Step 4: Simplify right side
    520,632.80x = 290,083,463,296.31
  5. Step 5: Solve for x
    x = 290,083,463,296.31/520,632.80
  6. Step 6: Final answer
    x = 557,174.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.