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Finding the Fourth Proportional to 317,039.12, 437,442.12 and 215,078.48

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Solution

The fourth proportional to 317,039.12, 437,442.12 and 215,078.48 is: 296,759.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,039.12 : 437,442.12 = 215,078.48 : x
  2. Step 2: Convert to fraction form
    317,039.12/437,442.12 = 215,078.48/x
  3. Step 3: Cross multiply
    317,039.12x = 437,442.12 × 215,078.48
  4. Step 4: Simplify right side
    317,039.12x = 94,084,386,257.58
  5. Step 5: Solve for x
    x = 94,084,386,257.58/317,039.12
  6. Step 6: Final answer
    x = 296,759.55

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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.