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Finding the Fourth Proportional to 977.46, 1,348.88 and 535.35

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Solution

The fourth proportional to 977.46, 1,348.88 and 535.35 is: 738.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.46 : 1,348.88 = 535.35 : x
  2. Step 2: Convert to fraction form
    977.46/1,348.88 = 535.35/x
  3. Step 3: Cross multiply
    977.46x = 1,348.88 × 535.35
  4. Step 4: Simplify right side
    977.46x = 722,125.29
  5. Step 5: Solve for x
    x = 722,125.29/977.46
  6. Step 6: Final answer
    x = 738.78

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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.