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Finding the Fourth Proportional to 647,215.10, 970,822.65 and 363,779.90

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Solution

The fourth proportional to 647,215.10, 970,822.65 and 363,779.90 is: 545,669.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,215.10 : 970,822.65 = 363,779.90 : x
  2. Step 2: Convert to fraction form
    647,215.10/970,822.65 = 363,779.90/x
  3. Step 3: Cross multiply
    647,215.10x = 970,822.65 × 363,779.90
  4. Step 4: Simplify right side
    647,215.10x = 353,165,766,534.74
  5. Step 5: Solve for x
    x = 353,165,766,534.74/647,215.10
  6. Step 6: Final answer
    x = 545,669.85

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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.