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Finding the Fourth Proportional to 415.59, 624.53 and 388.50

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Solution

The fourth proportional to 415.59, 624.53 and 388.50 is: 583.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    415.59 : 624.53 = 388.50 : x
  2. Step 2: Convert to fraction form
    415.59/624.53 = 388.50/x
  3. Step 3: Cross multiply
    415.59x = 624.53 × 388.50
  4. Step 4: Simplify right side
    415.59x = 242,627.96
  5. Step 5: Solve for x
    x = 242,627.96/415.59
  6. Step 6: Final answer
    x = 583.82

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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.