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Finding the Fourth Proportional to 544.40, 815.40 and 472.40

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Solution

The fourth proportional to 544.40, 815.40 and 472.40 is: 707.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    544.40 : 815.40 = 472.40 : x
  2. Step 2: Convert to fraction form
    544.40/815.40 = 472.40/x
  3. Step 3: Cross multiply
    544.40x = 815.40 × 472.40
  4. Step 4: Simplify right side
    544.40x = 385,194.96
  5. Step 5: Solve for x
    x = 385,194.96/544.40
  6. Step 6: Final answer
    x = 707.56

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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.