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Finding the Fourth Proportional to 900.05, 1,242.38 and 527.15

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Solution

The fourth proportional to 900.05, 1,242.38 and 527.15 is: 727.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.05 : 1,242.38 = 527.15 : x
  2. Step 2: Convert to fraction form
    900.05/1,242.38 = 527.15/x
  3. Step 3: Cross multiply
    900.05x = 1,242.38 × 527.15
  4. Step 4: Simplify right side
    900.05x = 654,925.04
  5. Step 5: Solve for x
    x = 654,925.04/900.05
  6. Step 6: Final answer
    x = 727.65

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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.