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Finding the Fourth Proportional to 315,711.58, 435,674.85 and 172,472.26

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Solution

The fourth proportional to 315,711.58, 435,674.85 and 172,472.26 is: 238,007.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,711.58 : 435,674.85 = 172,472.26 : x
  2. Step 2: Convert to fraction form
    315,711.58/435,674.85 = 172,472.26/x
  3. Step 3: Cross multiply
    315,711.58x = 435,674.85 × 172,472.26
  4. Step 4: Simplify right side
    315,711.58x = 75,141,826,004.66
  5. Step 5: Solve for x
    x = 75,141,826,004.66/315,711.58
  6. Step 6: Final answer
    x = 238,007.82

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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.