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Finding the Fourth Proportional to 451,515.87, 677,386.80 and 318,655.62

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Solution

The fourth proportional to 451,515.87, 677,386.80 and 318,655.62 is: 478,063.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,515.87 : 677,386.80 = 318,655.62 : x
  2. Step 2: Convert to fraction form
    451,515.87/677,386.80 = 318,655.62/x
  3. Step 3: Cross multiply
    451,515.87x = 677,386.80 × 318,655.62
  4. Step 4: Simplify right side
    451,515.87x = 215,853,110,733.82
  5. Step 5: Solve for x
    x = 215,853,110,733.82/451,515.87
  6. Step 6: Final answer
    x = 478,063.18

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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.