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Finding the Fourth Proportional to 943.78, 1,417.05 and 528.12

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Solution

The fourth proportional to 943.78, 1,417.05 and 528.12 is: 792.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.78 : 1,417.05 = 528.12 : x
  2. Step 2: Convert to fraction form
    943.78/1,417.05 = 528.12/x
  3. Step 3: Cross multiply
    943.78x = 1,417.05 × 528.12
  4. Step 4: Simplify right side
    943.78x = 748,372.45
  5. Step 5: Solve for x
    x = 748,372.45/943.78
  6. Step 6: Final answer
    x = 792.96

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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.