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Finding the Fourth Proportional to 1,527.81, 2,291.69 and 432.08

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Solution

The fourth proportional to 1,527.81, 2,291.69 and 432.08 is: 648.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,527.81 : 2,291.69 = 432.08 : x
  2. Step 2: Convert to fraction form
    1,527.81/2,291.69 = 432.08/x
  3. Step 3: Cross multiply
    1,527.81x = 2,291.69 × 432.08
  4. Step 4: Simplify right side
    1,527.81x = 990,204.52
  5. Step 5: Solve for x
    x = 990,204.52/1,527.81
  6. Step 6: Final answer
    x = 648.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.