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Finding the Fourth Proportional to 827,280.40, 1,240,920.60 and 266,314.90

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Solution

The fourth proportional to 827,280.40, 1,240,920.60 and 266,314.90 is: 399,472.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,280.40 : 1,240,920.60 = 266,314.90 : x
  2. Step 2: Convert to fraction form
    827,280.40/1,240,920.60 = 266,314.90/x
  3. Step 3: Cross multiply
    827,280.40x = 1,240,920.60 × 266,314.90
  4. Step 4: Simplify right side
    827,280.40x = 330,475,645,496.94
  5. Step 5: Solve for x
    x = 330,475,645,496.94/827,280.40
  6. Step 6: Final answer
    x = 399,472.35

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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.