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Finding the Fourth Proportional to 407,246.80, 610,870.20 and 256,999.90

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Solution

The fourth proportional to 407,246.80, 610,870.20 and 256,999.90 is: 385,499.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,246.80 : 610,870.20 = 256,999.90 : x
  2. Step 2: Convert to fraction form
    407,246.80/610,870.20 = 256,999.90/x
  3. Step 3: Cross multiply
    407,246.80x = 610,870.20 × 256,999.90
  4. Step 4: Simplify right side
    407,246.80x = 156,993,580,312.98
  5. Step 5: Solve for x
    x = 156,993,580,312.98/407,246.80
  6. Step 6: Final answer
    x = 385,499.85

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.