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Finding the Fourth Proportional to 420,473.36, 580,248.84 and 229,485.20

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Solution

The fourth proportional to 420,473.36, 580,248.84 and 229,485.20 is: 316,687.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,473.36 : 580,248.84 = 229,485.20 : x
  2. Step 2: Convert to fraction form
    420,473.36/580,248.84 = 229,485.20/x
  3. Step 3: Cross multiply
    420,473.36x = 580,248.84 × 229,485.20
  4. Step 4: Simplify right side
    420,473.36x = 133,158,521,097.17
  5. Step 5: Solve for x
    x = 133,158,521,097.17/420,473.36
  6. Step 6: Final answer
    x = 316,687.18

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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.