Home / 1,432.49-2,148.69-458.60

Finding the Fourth Proportional to 1,432.49, 2,148.69 and 458.60

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Solution

The fourth proportional to 1,432.49, 2,148.69 and 458.60 is: 687.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.49 : 2,148.69 = 458.60 : x
  2. Step 2: Convert to fraction form
    1,432.49/2,148.69 = 458.60/x
  3. Step 3: Cross multiply
    1,432.49x = 2,148.69 × 458.60
  4. Step 4: Simplify right side
    1,432.49x = 985,389.23
  5. Step 5: Solve for x
    x = 985,389.23/1,432.49
  6. Step 6: Final answer
    x = 687.89

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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.