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Finding the Fourth Proportional to 543.96, 815.88 and 436.40

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Solution

The fourth proportional to 543.96, 815.88 and 436.40 is: 654.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.96 : 815.88 = 436.40 : x
  2. Step 2: Convert to fraction form
    543.96/815.88 = 436.40/x
  3. Step 3: Cross multiply
    543.96x = 815.88 × 436.40
  4. Step 4: Simplify right side
    543.96x = 356,050.03
  5. Step 5: Solve for x
    x = 356,050.03/543.96
  6. Step 6: Final answer
    x = 654.55

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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.