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Finding the Fourth Proportional to 261,686.20, 392,529.30 and 235,442.20

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Solution

The fourth proportional to 261,686.20, 392,529.30 and 235,442.20 is: 353,163.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,686.20 : 392,529.30 = 235,442.20 : x
  2. Step 2: Convert to fraction form
    261,686.20/392,529.30 = 235,442.20/x
  3. Step 3: Cross multiply
    261,686.20x = 392,529.30 × 235,442.20
  4. Step 4: Simplify right side
    261,686.20x = 92,417,961,956.46
  5. Step 5: Solve for x
    x = 92,417,961,956.46/261,686.20
  6. Step 6: Final answer
    x = 353,163.30

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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.