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Finding the Fourth Proportional to 876.60, 1,315.56 and 443.52

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Solution

The fourth proportional to 876.60, 1,315.56 and 443.52 is: 665.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.60 : 1,315.56 = 443.52 : x
  2. Step 2: Convert to fraction form
    876.60/1,315.56 = 443.52/x
  3. Step 3: Cross multiply
    876.60x = 1,315.56 × 443.52
  4. Step 4: Simplify right side
    876.60x = 583,477.17
  5. Step 5: Solve for x
    x = 583,477.17/876.60
  6. Step 6: Final answer
    x = 665.61

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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.