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Finding the Fourth Proportional to 1,246.75, 1,870.13 and 477.43

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Solution

The fourth proportional to 1,246.75, 1,870.13 and 477.43 is: 716.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.75 : 1,870.13 = 477.43 : x
  2. Step 2: Convert to fraction form
    1,246.75/1,870.13 = 477.43/x
  3. Step 3: Cross multiply
    1,246.75x = 1,870.13 × 477.43
  4. Step 4: Simplify right side
    1,246.75x = 892,856.17
  5. Step 5: Solve for x
    x = 892,856.17/1,246.75
  6. Step 6: Final answer
    x = 716.15

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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.