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Finding the Fourth Proportional to 345,007.20, 517,510.80 and 251,695.20

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Solution

The fourth proportional to 345,007.20, 517,510.80 and 251,695.20 is: 377,542.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,007.20 : 517,510.80 = 251,695.20 : x
  2. Step 2: Convert to fraction form
    345,007.20/517,510.80 = 251,695.20/x
  3. Step 3: Cross multiply
    345,007.20x = 517,510.80 × 251,695.20
  4. Step 4: Simplify right side
    345,007.20x = 130,254,984,308.16
  5. Step 5: Solve for x
    x = 130,254,984,308.16/345,007.20
  6. Step 6: Final answer
    x = 377,542.80

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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.