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Finding the Fourth Proportional to 976.75, 1,347.92 and 562.75

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Solution

The fourth proportional to 976.75, 1,347.92 and 562.75 is: 776.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.75 : 1,347.92 = 562.75 : x
  2. Step 2: Convert to fraction form
    976.75/1,347.92 = 562.75/x
  3. Step 3: Cross multiply
    976.75x = 1,347.92 × 562.75
  4. Step 4: Simplify right side
    976.75x = 758,541.98
  5. Step 5: Solve for x
    x = 758,541.98/976.75
  6. Step 6: Final answer
    x = 776.60

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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.