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Finding the Fourth Proportional to 408,605.81, 564,153.80 and 255,705.81

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Solution

The fourth proportional to 408,605.81, 564,153.80 and 255,705.81 is: 353,047.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,605.81 : 564,153.80 = 255,705.81 : x
  2. Step 2: Convert to fraction form
    408,605.81/564,153.80 = 255,705.81/x
  3. Step 3: Cross multiply
    408,605.81x = 564,153.80 × 255,705.81
  4. Step 4: Simplify right side
    408,605.81x = 144,257,403,115.05
  5. Step 5: Solve for x
    x = 144,257,403,115.05/408,605.81
  6. Step 6: Final answer
    x = 353,047.86

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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.