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Finding the Fourth Proportional to 315,489.79, 435,373.95 and 172,249.83

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Solution

The fourth proportional to 315,489.79, 435,373.95 and 172,249.83 is: 237,703.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,489.79 : 435,373.95 = 172,249.83 : x
  2. Step 2: Convert to fraction form
    315,489.79/435,373.95 = 172,249.83/x
  3. Step 3: Cross multiply
    315,489.79x = 435,373.95 × 172,249.83
  4. Step 4: Simplify right side
    315,489.79x = 74,993,088,180.94
  5. Step 5: Solve for x
    x = 74,993,088,180.94/315,489.79
  6. Step 6: Final answer
    x = 237,703.70

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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.