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Finding the Fourth Proportional to 315,260.88, 435,061.26 and 172,023.90

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Solution

The fourth proportional to 315,260.88, 435,061.26 and 172,023.90 is: 237,393.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,260.88 : 435,061.26 = 172,023.90 : x
  2. Step 2: Convert to fraction form
    315,260.88/435,061.26 = 172,023.90/x
  3. Step 3: Cross multiply
    315,260.88x = 435,061.26 × 172,023.90
  4. Step 4: Simplify right side
    315,260.88x = 74,840,934,684.11
  5. Step 5: Solve for x
    x = 74,840,934,684.11/315,260.88
  6. Step 6: Final answer
    x = 237,393.66

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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.