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Finding the Fourth Proportional to 261,912.60, 392,908.68 and 133,758.72

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Solution

The fourth proportional to 261,912.60, 392,908.68 and 133,758.72 is: 200,658.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,912.60 : 392,908.68 = 133,758.72 : x
  2. Step 2: Convert to fraction form
    261,912.60/392,908.68 = 133,758.72/x
  3. Step 3: Cross multiply
    261,912.60x = 392,908.68 × 133,758.72
  4. Step 4: Simplify right side
    261,912.60x = 52,554,962,113.69
  5. Step 5: Solve for x
    x = 52,554,962,113.69/261,912.60
  6. Step 6: Final answer
    x = 200,658.40

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1.5x scale

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.