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Finding the Fourth Proportional to 808.58, 1,115.98 and 477.19

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Solution

The fourth proportional to 808.58, 1,115.98 and 477.19 is: 658.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.58 : 1,115.98 = 477.19 : x
  2. Step 2: Convert to fraction form
    808.58/1,115.98 = 477.19/x
  3. Step 3: Cross multiply
    808.58x = 1,115.98 × 477.19
  4. Step 4: Simplify right side
    808.58x = 532,534.70
  5. Step 5: Solve for x
    x = 532,534.70/808.58
  6. Step 6: Final answer
    x = 658.60

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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.