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Finding the Fourth Proportional to 313.47, 470.25 and 158.99

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Solution

The fourth proportional to 313.47, 470.25 and 158.99 is: 238.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.47 : 470.25 = 158.99 : x
  2. Step 2: Convert to fraction form
    313.47/470.25 = 158.99/x
  3. Step 3: Cross multiply
    313.47x = 470.25 × 158.99
  4. Step 4: Simplify right side
    313.47x = 74,762.70
  5. Step 5: Solve for x
    x = 74,762.70/313.47
  6. Step 6: Final answer
    x = 238.50

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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.