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Finding the Fourth Proportional to 914.32, 1,261.20 and 652.42

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Solution

The fourth proportional to 914.32, 1,261.20 and 652.42 is: 899.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.32 : 1,261.20 = 652.42 : x
  2. Step 2: Convert to fraction form
    914.32/1,261.20 = 652.42/x
  3. Step 3: Cross multiply
    914.32x = 1,261.20 × 652.42
  4. Step 4: Simplify right side
    914.32x = 822,832.10
  5. Step 5: Solve for x
    x = 822,832.10/914.32
  6. Step 6: Final answer
    x = 899.94

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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.