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Finding the Fourth Proportional to 880.48, 1,320.90 and 718.84

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Solution

The fourth proportional to 880.48, 1,320.90 and 718.84 is: 1,078.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.48 : 1,320.90 = 718.84 : x
  2. Step 2: Convert to fraction form
    880.48/1,320.90 = 718.84/x
  3. Step 3: Cross multiply
    880.48x = 1,320.90 × 718.84
  4. Step 4: Simplify right side
    880.48x = 949,515.76
  5. Step 5: Solve for x
    x = 949,515.76/880.48
  6. Step 6: Final answer
    x = 1,078.41

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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.