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Finding the Fourth Proportional to 885.77, 1,218.30 and 710.73

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Solution

The fourth proportional to 885.77, 1,218.30 and 710.73 is: 977.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.77 : 1,218.30 = 710.73 : x
  2. Step 2: Convert to fraction form
    885.77/1,218.30 = 710.73/x
  3. Step 3: Cross multiply
    885.77x = 1,218.30 × 710.73
  4. Step 4: Simplify right side
    885.77x = 865,882.36
  5. Step 5: Solve for x
    x = 865,882.36/885.77
  6. Step 6: Final answer
    x = 977.55

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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.