Home / 420,390.40-580,151.08-229,416.12

Finding the Fourth Proportional to 420,390.40, 580,151.08 and 229,416.12

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Solution

The fourth proportional to 420,390.40, 580,151.08 and 229,416.12 is: 316,600.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,390.40 : 580,151.08 = 229,416.12 : x
  2. Step 2: Convert to fraction form
    420,390.40/580,151.08 = 229,416.12/x
  3. Step 3: Cross multiply
    420,390.40x = 580,151.08 × 229,416.12
  4. Step 4: Simplify right side
    420,390.40x = 133,096,009,787.41
  5. Step 5: Solve for x
    x = 133,096,009,787.41/420,390.40
  6. Step 6: Final answer
    x = 316,600.97

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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.