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Finding the Fourth Proportional to 1,527.42, 2,289.50 and 661.54

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Solution

The fourth proportional to 1,527.42, 2,289.50 and 661.54 is: 991.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,527.42 : 2,289.50 = 661.54 : x
  2. Step 2: Convert to fraction form
    1,527.42/2,289.50 = 661.54/x
  3. Step 3: Cross multiply
    1,527.42x = 2,289.50 × 661.54
  4. Step 4: Simplify right side
    1,527.42x = 1,514,595.83
  5. Step 5: Solve for x
    x = 1,514,595.83/1,527.42
  6. Step 6: Final answer
    x = 991.60

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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.