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Finding the Fourth Proportional to 754.76, 1,040.19 and 518.72

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Solution

The fourth proportional to 754.76, 1,040.19 and 518.72 is: 714.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.76 : 1,040.19 = 518.72 : x
  2. Step 2: Convert to fraction form
    754.76/1,040.19 = 518.72/x
  3. Step 3: Cross multiply
    754.76x = 1,040.19 × 518.72
  4. Step 4: Simplify right side
    754.76x = 539,567.36
  5. Step 5: Solve for x
    x = 539,567.36/754.76
  6. Step 6: Final answer
    x = 714.89

Related Problems

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Half scale
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Double scale
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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.