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Finding the Fourth Proportional to 920.12, 1,269.86 and 527.12

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Solution

The fourth proportional to 920.12, 1,269.86 and 527.12 is: 727.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    920.12 : 1,269.86 = 527.12 : x
  2. Step 2: Convert to fraction form
    920.12/1,269.86 = 527.12/x
  3. Step 3: Cross multiply
    920.12x = 1,269.86 × 527.12
  4. Step 4: Simplify right side
    920.12x = 669,368.60
  5. Step 5: Solve for x
    x = 669,368.60/920.12
  6. Step 6: Final answer
    x = 727.48

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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.