Home / 715,434.60-987,084.45-428,850.12

Finding the Fourth Proportional to 715,434.60, 987,084.45 and 428,850.12

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Solution

The fourth proportional to 715,434.60, 987,084.45 and 428,850.12 is: 591,684.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,434.60 : 987,084.45 = 428,850.12 : x
  2. Step 2: Convert to fraction form
    715,434.60/987,084.45 = 428,850.12/x
  3. Step 3: Cross multiply
    715,434.60x = 987,084.45 × 428,850.12
  4. Step 4: Simplify right side
    715,434.60x = 423,311,284,832.63
  5. Step 5: Solve for x
    x = 423,311,284,832.63/715,434.60
  6. Step 6: Final answer
    x = 591,684.11

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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.