Home / 715,440.60-987,092.73-428,856.12

Finding the Fourth Proportional to 715,440.60, 987,092.73 and 428,856.12

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Solution

The fourth proportional to 715,440.60, 987,092.73 and 428,856.12 is: 591,692.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,440.60 : 987,092.73 = 428,856.12 : x
  2. Step 2: Convert to fraction form
    715,440.60/987,092.73 = 428,856.12/x
  3. Step 3: Cross multiply
    715,440.60x = 987,092.73 × 428,856.12
  4. Step 4: Simplify right side
    715,440.60x = 423,320,758,268.01
  5. Step 5: Solve for x
    x = 423,320,758,268.01/715,440.60
  6. Step 6: Final answer
    x = 591,692.39

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Double scale
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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.