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Finding the Fourth Proportional to 261,908.40, 392,279.40 and 215,252.40

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Solution

The fourth proportional to 261,908.40, 392,279.40 and 215,252.40 is: 322,399.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,908.40 : 392,279.40 = 215,252.40 : x
  2. Step 2: Convert to fraction form
    261,908.40/392,279.40 = 215,252.40/x
  3. Step 3: Cross multiply
    261,908.40x = 392,279.40 × 215,252.40
  4. Step 4: Simplify right side
    261,908.40x = 84,439,082,320.56
  5. Step 5: Solve for x
    x = 84,439,082,320.56/261,908.40
  6. Step 6: Final answer
    x = 322,399.29

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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.