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Finding the Fourth Proportional to 715,559.68, 987,496.12 and 421,156.04

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Solution

The fourth proportional to 715,559.68, 987,496.12 and 421,156.04 is: 581,209.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,559.68 : 987,496.12 = 421,156.04 : x
  2. Step 2: Convert to fraction form
    715,559.68/987,496.12 = 421,156.04/x
  3. Step 3: Cross multiply
    715,559.68x = 987,496.12 × 421,156.04
  4. Step 4: Simplify right side
    715,559.68x = 415,889,955,414.57
  5. Step 5: Solve for x
    x = 415,889,955,414.57/715,559.68
  6. Step 6: Final answer
    x = 581,209.32

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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.