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Finding the Fourth Proportional to 250,715.91, 375,720.30 and 138,446.67

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Solution

The fourth proportional to 250,715.91, 375,720.30 and 138,446.67 is: 207,474.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,715.91 : 375,720.30 = 138,446.67 : x
  2. Step 2: Convert to fraction form
    250,715.91/375,720.30 = 138,446.67/x
  3. Step 3: Cross multiply
    250,715.91x = 375,720.30 × 138,446.67
  4. Step 4: Simplify right side
    250,715.91x = 52,017,224,386.40
  5. Step 5: Solve for x
    x = 52,017,224,386.40/250,715.91
  6. Step 6: Final answer
    x = 207,474.76

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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.