Home / 1,445.12-2,167.85-457.86

Finding the Fourth Proportional to 1,445.12, 2,167.85 and 457.86

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Solution

The fourth proportional to 1,445.12, 2,167.85 and 457.86 is: 686.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,445.12 : 2,167.85 = 457.86 : x
  2. Step 2: Convert to fraction form
    1,445.12/2,167.85 = 457.86/x
  3. Step 3: Cross multiply
    1,445.12x = 2,167.85 × 457.86
  4. Step 4: Simplify right side
    1,445.12x = 992,571.80
  5. Step 5: Solve for x
    x = 992,571.80/1,445.12
  6. Step 6: Final answer
    x = 686.84

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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.