Home / 1,148.35-1,721.34-454.78

Finding the Fourth Proportional to 1,148.35, 1,721.34 and 454.78

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Solution

The fourth proportional to 1,148.35, 1,721.34 and 454.78 is: 681.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148.35 : 1,721.34 = 454.78 : x
  2. Step 2: Convert to fraction form
    1,148.35/1,721.34 = 454.78/x
  3. Step 3: Cross multiply
    1,148.35x = 1,721.34 × 454.78
  4. Step 4: Simplify right side
    1,148.35x = 782,831.01
  5. Step 5: Solve for x
    x = 782,831.01/1,148.35
  6. Step 6: Final answer
    x = 681.70

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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.