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Finding the Fourth Proportional to 518.70, 777.98 and 153.46

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Solution

The fourth proportional to 518.70, 777.98 and 153.46 is: 230.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.70 : 777.98 = 153.46 : x
  2. Step 2: Convert to fraction form
    518.70/777.98 = 153.46/x
  3. Step 3: Cross multiply
    518.70x = 777.98 × 153.46
  4. Step 4: Simplify right side
    518.70x = 119,388.81
  5. Step 5: Solve for x
    x = 119,388.81/518.70
  6. Step 6: Final answer
    x = 230.17

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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.