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Finding the Fourth Proportional to 772.57, 1,066.20 and 477.68

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Solution

The fourth proportional to 772.57, 1,066.20 and 477.68 is: 659.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.57 : 1,066.20 = 477.68 : x
  2. Step 2: Convert to fraction form
    772.57/1,066.20 = 477.68/x
  3. Step 3: Cross multiply
    772.57x = 1,066.20 × 477.68
  4. Step 4: Simplify right side
    772.57x = 509,302.42
  5. Step 5: Solve for x
    x = 509,302.42/772.57
  6. Step 6: Final answer
    x = 659.23

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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.