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Finding the Fourth Proportional to 667,310.30, 1,000,965.45 and 555,117.20

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Solution

The fourth proportional to 667,310.30, 1,000,965.45 and 555,117.20 is: 832,675.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,310.30 : 1,000,965.45 = 555,117.20 : x
  2. Step 2: Convert to fraction form
    667,310.30/1,000,965.45 = 555,117.20/x
  3. Step 3: Cross multiply
    667,310.30x = 1,000,965.45 × 555,117.20
  4. Step 4: Simplify right side
    667,310.30x = 555,653,137,900.74
  5. Step 5: Solve for x
    x = 555,653,137,900.74/667,310.30
  6. Step 6: Final answer
    x = 832,675.80

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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.