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Finding the Fourth Proportional to 702.47, 969.47 and 403.75

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Solution

The fourth proportional to 702.47, 969.47 and 403.75 is: 557.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.47 : 969.47 = 403.75 : x
  2. Step 2: Convert to fraction form
    702.47/969.47 = 403.75/x
  3. Step 3: Cross multiply
    702.47x = 969.47 × 403.75
  4. Step 4: Simplify right side
    702.47x = 391,421.49
  5. Step 5: Solve for x
    x = 391,421.49/702.47
  6. Step 6: Final answer
    x = 557.21

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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.