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Finding the Fourth Proportional to 687.51, 949.50 and 541.71

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Solution

The fourth proportional to 687.51, 949.50 and 541.71 is: 748.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.51 : 949.50 = 541.71 : x
  2. Step 2: Convert to fraction form
    687.51/949.50 = 541.71/x
  3. Step 3: Cross multiply
    687.51x = 949.50 × 541.71
  4. Step 4: Simplify right side
    687.51x = 514,353.65
  5. Step 5: Solve for x
    x = 514,353.65/687.51
  6. Step 6: Final answer
    x = 748.14

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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.