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Finding the Fourth Proportional to 660.28, 910.86 and 473.80

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Solution

The fourth proportional to 660.28, 910.86 and 473.80 is: 653.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    660.28 : 910.86 = 473.80 : x
  2. Step 2: Convert to fraction form
    660.28/910.86 = 473.80/x
  3. Step 3: Cross multiply
    660.28x = 910.86 × 473.80
  4. Step 4: Simplify right side
    660.28x = 431,565.47
  5. Step 5: Solve for x
    x = 431,565.47/660.28
  6. Step 6: Final answer
    x = 653.61

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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.