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Finding the Fourth Proportional to 908.58, 1,253.47 and 659.35

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Solution

The fourth proportional to 908.58, 1,253.47 and 659.35 is: 909.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.58 : 1,253.47 = 659.35 : x
  2. Step 2: Convert to fraction form
    908.58/1,253.47 = 659.35/x
  3. Step 3: Cross multiply
    908.58x = 1,253.47 × 659.35
  4. Step 4: Simplify right side
    908.58x = 826,470.66
  5. Step 5: Solve for x
    x = 826,470.66/908.58
  6. Step 6: Final answer
    x = 909.63

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Double scale
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1.5x scale

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.