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Finding the Fourth Proportional to 881.34, 1,215.10 and 758.32

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Solution

The fourth proportional to 881.34, 1,215.10 and 758.32 is: 1,045.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.34 : 1,215.10 = 758.32 : x
  2. Step 2: Convert to fraction form
    881.34/1,215.10 = 758.32/x
  3. Step 3: Cross multiply
    881.34x = 1,215.10 × 758.32
  4. Step 4: Simplify right side
    881.34x = 921,430.84
  5. Step 5: Solve for x
    x = 921,430.84/881.34
  6. Step 6: Final answer
    x = 1,045.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.