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Finding the Fourth Proportional to 659.57, 909.55 and 559.87

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Solution

The fourth proportional to 659.57, 909.55 and 559.87 is: 772.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.57 : 909.55 = 559.87 : x
  2. Step 2: Convert to fraction form
    659.57/909.55 = 559.87/x
  3. Step 3: Cross multiply
    659.57x = 909.55 × 559.87
  4. Step 4: Simplify right side
    659.57x = 509,227.59
  5. Step 5: Solve for x
    x = 509,227.59/659.57
  6. Step 6: Final answer
    x = 772.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.