Home / 1,421.60-2,132.38-555.90

Finding the Fourth Proportional to 1,421.60, 2,132.38 and 555.90

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Solution

The fourth proportional to 1,421.60, 2,132.38 and 555.90 is: 833.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.60 : 2,132.38 = 555.90 : x
  2. Step 2: Convert to fraction form
    1,421.60/2,132.38 = 555.90/x
  3. Step 3: Cross multiply
    1,421.60x = 2,132.38 × 555.90
  4. Step 4: Simplify right side
    1,421.60x = 1,185,387.26
  5. Step 5: Solve for x
    x = 1,185,387.26/1,421.60
  6. Step 6: Final answer
    x = 833.84

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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.