Home / 420,388.40-580,148.32-229,414.12

Finding the Fourth Proportional to 420,388.40, 580,148.32 and 229,414.12

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Solution

The fourth proportional to 420,388.40, 580,148.32 and 229,414.12 is: 316,598.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,388.40 : 580,148.32 = 229,414.12 : x
  2. Step 2: Convert to fraction form
    420,388.40/580,148.32 = 229,414.12/x
  3. Step 3: Cross multiply
    420,388.40x = 580,148.32 × 229,414.12
  4. Step 4: Simplify right side
    420,388.40x = 133,094,216,302.28
  5. Step 5: Solve for x
    x = 133,094,216,302.28/420,388.40
  6. Step 6: Final answer
    x = 316,598.21

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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.