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Finding the Fourth Proportional to 880.49, 1,320.72 and 510.85

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Solution

The fourth proportional to 880.49, 1,320.72 and 510.85 is: 766.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.49 : 1,320.72 = 510.85 : x
  2. Step 2: Convert to fraction form
    880.49/1,320.72 = 510.85/x
  3. Step 3: Cross multiply
    880.49x = 1,320.72 × 510.85
  4. Step 4: Simplify right side
    880.49x = 674,689.81
  5. Step 5: Solve for x
    x = 674,689.81/880.49
  6. Step 6: Final answer
    x = 766.27

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Double scale
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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.