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Finding the Fourth Proportional to 1,032.76, 1,423.14 and 770.32

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Solution

The fourth proportional to 1,032.76, 1,423.14 and 770.32 is: 1,061.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,032.76 : 1,423.14 = 770.32 : x
  2. Step 2: Convert to fraction form
    1,032.76/1,423.14 = 770.32/x
  3. Step 3: Cross multiply
    1,032.76x = 1,423.14 × 770.32
  4. Step 4: Simplify right side
    1,032.76x = 1,096,273.20
  5. Step 5: Solve for x
    x = 1,096,273.20/1,032.76
  6. Step 6: Final answer
    x = 1,061.50

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Half scale
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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.