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Finding the Fourth Proportional to 816.76, 1,127.70 and 627.39

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Solution

The fourth proportional to 816.76, 1,127.70 and 627.39 is: 866.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.76 : 1,127.70 = 627.39 : x
  2. Step 2: Convert to fraction form
    816.76/1,127.70 = 627.39/x
  3. Step 3: Cross multiply
    816.76x = 1,127.70 × 627.39
  4. Step 4: Simplify right side
    816.76x = 707,512.17
  5. Step 5: Solve for x
    x = 707,512.17/816.76
  6. Step 6: Final answer
    x = 866.24

Related Problems

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Half scale
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Double scale
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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.