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Finding the Fourth Proportional to 976.55, 1,350.23 and 853.52

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Solution

The fourth proportional to 976.55, 1,350.23 and 853.52 is: 1,180.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    976.55 : 1,350.23 = 853.52 : x
  2. Step 2: Convert to fraction form
    976.55/1,350.23 = 853.52/x
  3. Step 3: Cross multiply
    976.55x = 1,350.23 × 853.52
  4. Step 4: Simplify right side
    976.55x = 1,152,437.29
  5. Step 5: Solve for x
    x = 1,152,437.29/976.55
  6. Step 6: Final answer
    x = 1,180.12

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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.