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Finding the Fourth Proportional to 881.84, 1,217.12 and 508.76

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Solution

The fourth proportional to 881.84, 1,217.12 and 508.76 is: 702.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.84 : 1,217.12 = 508.76 : x
  2. Step 2: Convert to fraction form
    881.84/1,217.12 = 508.76/x
  3. Step 3: Cross multiply
    881.84x = 1,217.12 × 508.76
  4. Step 4: Simplify right side
    881.84x = 619,222.47
  5. Step 5: Solve for x
    x = 619,222.47/881.84
  6. Step 6: Final answer
    x = 702.20

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.