Home / 674,665.80-1,011,350.70-390,064.20

Finding the Fourth Proportional to 674,665.80, 1,011,350.70 and 390,064.20

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Solution

The fourth proportional to 674,665.80, 1,011,350.70 and 390,064.20 is: 584,721.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,665.80 : 1,011,350.70 = 390,064.20 : x
  2. Step 2: Convert to fraction form
    674,665.80/1,011,350.70 = 390,064.20/x
  3. Step 3: Cross multiply
    674,665.80x = 1,011,350.70 × 390,064.20
  4. Step 4: Simplify right side
    674,665.80x = 394,491,701,714.94
  5. Step 5: Solve for x
    x = 394,491,701,714.94/674,665.80
  6. Step 6: Final answer
    x = 584,721.65

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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.