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Finding the Fourth Proportional to 876.41, 1,314.23 and 328.21

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Solution

The fourth proportional to 876.41, 1,314.23 and 328.21 is: 492.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.41 : 1,314.23 = 328.21 : x
  2. Step 2: Convert to fraction form
    876.41/1,314.23 = 328.21/x
  3. Step 3: Cross multiply
    876.41x = 1,314.23 × 328.21
  4. Step 4: Simplify right side
    876.41x = 431,338.90
  5. Step 5: Solve for x
    x = 431,338.90/876.41
  6. Step 6: Final answer
    x = 492.17

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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.