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Finding the Fourth Proportional to 315,717.68, 435,720.42 and 172,499.24

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Solution

The fourth proportional to 315,717.68, 435,720.42 and 172,499.24 is: 238,065.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,717.68 : 435,720.42 = 172,499.24 : x
  2. Step 2: Convert to fraction form
    315,717.68/435,720.42 = 172,499.24/x
  3. Step 3: Cross multiply
    315,717.68x = 435,720.42 × 172,499.24
  4. Step 4: Simplify right side
    315,717.68x = 75,161,441,302.48
  5. Step 5: Solve for x
    x = 75,161,441,302.48/315,717.68
  6. Step 6: Final answer
    x = 238,065.35

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1.5x scale

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.