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Finding the Fourth Proportional to 883.52, 1,330.40 and 776.60

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Solution

The fourth proportional to 883.52, 1,330.40 and 776.60 is: 1,169.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.52 : 1,330.40 = 776.60 : x
  2. Step 2: Convert to fraction form
    883.52/1,330.40 = 776.60/x
  3. Step 3: Cross multiply
    883.52x = 1,330.40 × 776.60
  4. Step 4: Simplify right side
    883.52x = 1,033,188.64
  5. Step 5: Solve for x
    x = 1,033,188.64/883.52
  6. Step 6: Final answer
    x = 1,169.40

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.