Home / 420,389.15-580,149.36-229,414.86

Finding the Fourth Proportional to 420,389.15, 580,149.36 and 229,414.86

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Solution

The fourth proportional to 420,389.15, 580,149.36 and 229,414.86 is: 316,599.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,389.15 : 580,149.36 = 229,414.86 : x
  2. Step 2: Convert to fraction form
    420,389.15/580,149.36 = 229,414.86/x
  3. Step 3: Cross multiply
    420,389.15x = 580,149.36 × 229,414.86
  4. Step 4: Simplify right side
    420,389.15x = 133,094,884,203.49
  5. Step 5: Solve for x
    x = 133,094,884,203.49/420,389.15
  6. Step 6: Final answer
    x = 316,599.24

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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.