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Finding the Fourth Proportional to 363,886.20, 545,829.30 and 142,270.20

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Solution

The fourth proportional to 363,886.20, 545,829.30 and 142,270.20 is: 213,405.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,886.20 : 545,829.30 = 142,270.20 : x
  2. Step 2: Convert to fraction form
    363,886.20/545,829.30 = 142,270.20/x
  3. Step 3: Cross multiply
    363,886.20x = 545,829.30 × 142,270.20
  4. Step 4: Simplify right side
    363,886.20x = 77,655,243,676.86
  5. Step 5: Solve for x
    x = 77,655,243,676.86/363,886.20
  6. Step 6: Final answer
    x = 213,405.30

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Similar ratio
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1.5x scale

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.