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Finding the Fourth Proportional to 259,338.16, 388,993.47 and 79,423.53

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Solution

The fourth proportional to 259,338.16, 388,993.47 and 79,423.53 is: 119,131.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,338.16 : 388,993.47 = 79,423.53 : x
  2. Step 2: Convert to fraction form
    259,338.16/388,993.47 = 79,423.53/x
  3. Step 3: Cross multiply
    259,338.16x = 388,993.47 × 79,423.53
  4. Step 4: Simplify right side
    259,338.16x = 30,895,234,534.35
  5. Step 5: Solve for x
    x = 30,895,234,534.35/259,338.16
  6. Step 6: Final answer
    x = 119,131.08

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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.