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Finding the Fourth Proportional to 416, 624 and 155.99

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Solution

The fourth proportional to 416, 624 and 155.99 is: 233.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    416 : 624 = 155.99 : x
  2. Step 2: Convert to fraction form
    416/624 = 155.99/x
  3. Step 3: Cross multiply
    416x = 624 × 155.99
  4. Step 4: Simplify right side
    416x = 97,337.76
  5. Step 5: Solve for x
    x = 97,337.76/416
  6. Step 6: Final answer
    x = 233.99

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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.