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Finding the Fourth Proportional to 872.76, 1,204.54 and 663.24

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Solution

The fourth proportional to 872.76, 1,204.54 and 663.24 is: 915.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.76 : 1,204.54 = 663.24 : x
  2. Step 2: Convert to fraction form
    872.76/1,204.54 = 663.24/x
  3. Step 3: Cross multiply
    872.76x = 1,204.54 × 663.24
  4. Step 4: Simplify right side
    872.76x = 798,899.11
  5. Step 5: Solve for x
    x = 798,899.11/872.76
  6. Step 6: Final answer
    x = 915.37

Related Problems

Find fourth proportional to 436.38, 602.27 and 331.62
Half scale
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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.