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Finding the Fourth Proportional to 702.67, 968.92 and 478.75

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Solution

The fourth proportional to 702.67, 968.92 and 478.75 is: 660.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.67 : 968.92 = 478.75 : x
  2. Step 2: Convert to fraction form
    702.67/968.92 = 478.75/x
  3. Step 3: Cross multiply
    702.67x = 968.92 × 478.75
  4. Step 4: Simplify right side
    702.67x = 463,870.45
  5. Step 5: Solve for x
    x = 463,870.45/702.67
  6. Step 6: Final answer
    x = 660.15

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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.