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Finding the Fourth Proportional to 691,805.80, 1,037,363.10 and 317,405.80

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Solution

The fourth proportional to 691,805.80, 1,037,363.10 and 317,405.80 is: 475,950.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,805.80 : 1,037,363.10 = 317,405.80 : x
  2. Step 2: Convert to fraction form
    691,805.80/1,037,363.10 = 317,405.80/x
  3. Step 3: Cross multiply
    691,805.80x = 1,037,363.10 × 317,405.80
  4. Step 4: Simplify right side
    691,805.80x = 329,265,064,645.98
  5. Step 5: Solve for x
    x = 329,265,064,645.98/691,805.80
  6. Step 6: Final answer
    x = 475,950.14

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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.