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Finding the Fourth Proportional to 644.76, 887.76 and 599.40

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Solution

The fourth proportional to 644.76, 887.76 and 599.40 is: 825.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.76 : 887.76 = 599.40 : x
  2. Step 2: Convert to fraction form
    644.76/887.76 = 599.40/x
  3. Step 3: Cross multiply
    644.76x = 887.76 × 599.40
  4. Step 4: Simplify right side
    644.76x = 532,123.34
  5. Step 5: Solve for x
    x = 532,123.34/644.76
  6. Step 6: Final answer
    x = 825.30

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Find fourth proportional to 322.38, 443.88 and 299.70
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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.