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Finding the Fourth Proportional to 539.97, 745.19 and 315.89

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Solution

The fourth proportional to 539.97, 745.19 and 315.89 is: 435.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.97 : 745.19 = 315.89 : x
  2. Step 2: Convert to fraction form
    539.97/745.19 = 315.89/x
  3. Step 3: Cross multiply
    539.97x = 745.19 × 315.89
  4. Step 4: Simplify right side
    539.97x = 235,392.76
  5. Step 5: Solve for x
    x = 235,392.76/539.97
  6. Step 6: Final answer
    x = 435.94

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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.