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Finding the Fourth Proportional to 518,839.12, 715,996.13 and 289,396.22

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Solution

The fourth proportional to 518,839.12, 715,996.13 and 289,396.22 is: 399,365.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,839.12 : 715,996.13 = 289,396.22 : x
  2. Step 2: Convert to fraction form
    518,839.12/715,996.13 = 289,396.22/x
  3. Step 3: Cross multiply
    518,839.12x = 715,996.13 × 289,396.22
  4. Step 4: Simplify right side
    518,839.12x = 207,206,576,070.11
  5. Step 5: Solve for x
    x = 207,206,576,070.11/518,839.12
  6. Step 6: Final answer
    x = 399,365.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.