Home / 457,849.20-686,890.40-142,308.80

Finding the Fourth Proportional to 457,849.20, 686,890.40 and 142,308.80

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Solution

The fourth proportional to 457,849.20, 686,890.40 and 142,308.80 is: 213,499.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,849.20 : 686,890.40 = 142,308.80 : x
  2. Step 2: Convert to fraction form
    457,849.20/686,890.40 = 142,308.80/x
  3. Step 3: Cross multiply
    457,849.20x = 686,890.40 × 142,308.80
  4. Step 4: Simplify right side
    457,849.20x = 97,750,548,555.52
  5. Step 5: Solve for x
    x = 97,750,548,555.52/457,849.20
  6. Step 6: Final answer
    x = 213,499.44

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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.