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Finding the Fourth Proportional to 900.72, 1,244.16 and 652.86

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Solution

The fourth proportional to 900.72, 1,244.16 and 652.86 is: 901.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.72 : 1,244.16 = 652.86 : x
  2. Step 2: Convert to fraction form
    900.72/1,244.16 = 652.86/x
  3. Step 3: Cross multiply
    900.72x = 1,244.16 × 652.86
  4. Step 4: Simplify right side
    900.72x = 812,262.30
  5. Step 5: Solve for x
    x = 812,262.30/900.72
  6. Step 6: Final answer
    x = 901.79

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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.