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Finding the Fourth Proportional to 900.42, 1,242.42 and 527.49

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Solution

The fourth proportional to 900.42, 1,242.42 and 527.49 is: 727.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.42 : 1,242.42 = 527.49 : x
  2. Step 2: Convert to fraction form
    900.42/1,242.42 = 527.49/x
  3. Step 3: Cross multiply
    900.42x = 1,242.42 × 527.49
  4. Step 4: Simplify right side
    900.42x = 655,364.13
  5. Step 5: Solve for x
    x = 655,364.13/900.42
  6. Step 6: Final answer
    x = 727.84

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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.