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Finding the Fourth Proportional to 420,358.76, 580,109.10 and 229,382.64

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Solution

The fourth proportional to 420,358.76, 580,109.10 and 229,382.64 is: 316,555.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,358.76 : 580,109.10 = 229,382.64 : x
  2. Step 2: Convert to fraction form
    420,358.76/580,109.10 = 229,382.64/x
  3. Step 3: Cross multiply
    420,358.76x = 580,109.10 × 229,382.64
  4. Step 4: Simplify right side
    420,358.76x = 133,066,956,846.02
  5. Step 5: Solve for x
    x = 133,066,956,846.02/420,358.76
  6. Step 6: Final answer
    x = 316,555.69

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Double scale
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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.