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Finding the Fourth Proportional to 543.40, 815.10 and 528.04

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Solution

The fourth proportional to 543.40, 815.10 and 528.04 is: 792.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.40 : 815.10 = 528.04 : x
  2. Step 2: Convert to fraction form
    543.40/815.10 = 528.04/x
  3. Step 3: Cross multiply
    543.40x = 815.10 × 528.04
  4. Step 4: Simplify right side
    543.40x = 430,405.40
  5. Step 5: Solve for x
    x = 430,405.40/543.40
  6. Step 6: Final answer
    x = 792.06

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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.