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Finding the Fourth Proportional to 487,064.40, 730,078.20 and 187,429.20

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Solution

The fourth proportional to 487,064.40, 730,078.20 and 187,429.20 is: 280,944.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,064.40 : 730,078.20 = 187,429.20 : x
  2. Step 2: Convert to fraction form
    487,064.40/730,078.20 = 187,429.20/x
  3. Step 3: Cross multiply
    487,064.40x = 730,078.20 × 187,429.20
  4. Step 4: Simplify right side
    487,064.40x = 136,837,972,963.44
  5. Step 5: Solve for x
    x = 136,837,972,963.44/487,064.40
  6. Step 6: Final answer
    x = 280,944.31

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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.