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Finding the Fourth Proportional to 560.88, 839.61 and 511.56

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Solution

The fourth proportional to 560.88, 839.61 and 511.56 is: 765.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.88 : 839.61 = 511.56 : x
  2. Step 2: Convert to fraction form
    560.88/839.61 = 511.56/x
  3. Step 3: Cross multiply
    560.88x = 839.61 × 511.56
  4. Step 4: Simplify right side
    560.88x = 429,510.89
  5. Step 5: Solve for x
    x = 429,510.89/560.88
  6. Step 6: Final answer
    x = 765.78

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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.