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Finding the Fourth Proportional to 849.65, 1,281.53 and 748.19

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Solution

The fourth proportional to 849.65, 1,281.53 and 748.19 is: 1,128.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.65 : 1,281.53 = 748.19 : x
  2. Step 2: Convert to fraction form
    849.65/1,281.53 = 748.19/x
  3. Step 3: Cross multiply
    849.65x = 1,281.53 × 748.19
  4. Step 4: Simplify right side
    849.65x = 958,833.01
  5. Step 5: Solve for x
    x = 958,833.01/849.65
  6. Step 6: Final answer
    x = 1,128.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.