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Finding the Fourth Proportional to 420,295.54, 580,009.77 and 229,312.90

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Solution

The fourth proportional to 420,295.54, 580,009.77 and 229,312.90 is: 316,452.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,295.54 : 580,009.77 = 229,312.90 : x
  2. Step 2: Convert to fraction form
    420,295.54/580,009.77 = 229,312.90/x
  3. Step 3: Cross multiply
    420,295.54x = 580,009.77 × 229,312.90
  4. Step 4: Simplify right side
    420,295.54x = 133,003,722,387.03
  5. Step 5: Solve for x
    x = 133,003,722,387.03/420,295.54
  6. Step 6: Final answer
    x = 316,452.85

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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.