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Finding the Fourth Proportional to 918.52, 1,377.50 and 528.45

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Solution

The fourth proportional to 918.52, 1,377.50 and 528.45 is: 792.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.52 : 1,377.50 = 528.45 : x
  2. Step 2: Convert to fraction form
    918.52/1,377.50 = 528.45/x
  3. Step 3: Cross multiply
    918.52x = 1,377.50 × 528.45
  4. Step 4: Simplify right side
    918.52x = 727,939.88
  5. Step 5: Solve for x
    x = 727,939.88/918.52
  6. Step 6: Final answer
    x = 792.51

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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.