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Finding the Fourth Proportional to 901.17, 1,351.45 and 315.94

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Solution

The fourth proportional to 901.17, 1,351.45 and 315.94 is: 473.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.17 : 1,351.45 = 315.94 : x
  2. Step 2: Convert to fraction form
    901.17/1,351.45 = 315.94/x
  3. Step 3: Cross multiply
    901.17x = 1,351.45 × 315.94
  4. Step 4: Simplify right side
    901.17x = 426,977.11
  5. Step 5: Solve for x
    x = 426,977.11/901.17
  6. Step 6: Final answer
    x = 473.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.