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Finding the Fourth Proportional to 977.44, 1,348.91 and 535.32

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Solution

The fourth proportional to 977.44, 1,348.91 and 535.32 is: 738.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.44 : 1,348.91 = 535.32 : x
  2. Step 2: Convert to fraction form
    977.44/1,348.91 = 535.32/x
  3. Step 3: Cross multiply
    977.44x = 1,348.91 × 535.32
  4. Step 4: Simplify right side
    977.44x = 722,098.50
  5. Step 5: Solve for x
    x = 722,098.50/977.44
  6. Step 6: Final answer
    x = 738.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.