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Finding the Fourth Proportional to 261,644.70, 392,927.85 and 253,350.30

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Solution

The fourth proportional to 261,644.70, 392,927.85 and 253,350.30 is: 380,471.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,644.70 : 392,927.85 = 253,350.30 : x
  2. Step 2: Convert to fraction form
    261,644.70/392,927.85 = 253,350.30/x
  3. Step 3: Cross multiply
    261,644.70x = 392,927.85 × 253,350.30
  4. Step 4: Simplify right side
    261,644.70x = 99,548,388,675.86
  5. Step 5: Solve for x
    x = 99,548,388,675.86/261,644.70
  6. Step 6: Final answer
    x = 380,471.64

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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.