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Finding the Fourth Proportional to 702.90, 968.12 and 609.65

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Solution

The fourth proportional to 702.90, 968.12 and 609.65 is: 839.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    702.90 : 968.12 = 609.65 : x
  2. Step 2: Convert to fraction form
    702.90/968.12 = 609.65/x
  3. Step 3: Cross multiply
    702.90x = 968.12 × 609.65
  4. Step 4: Simplify right side
    702.90x = 590,206.47
  5. Step 5: Solve for x
    x = 590,206.47/702.90
  6. Step 6: Final answer
    x = 839.67

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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.