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Finding the Fourth Proportional to 977.30, 1,348.65 and 535.19

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Solution

The fourth proportional to 977.30, 1,348.65 and 535.19 is: 738.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.30 : 1,348.65 = 535.19 : x
  2. Step 2: Convert to fraction form
    977.30/1,348.65 = 535.19/x
  3. Step 3: Cross multiply
    977.30x = 1,348.65 × 535.19
  4. Step 4: Simplify right side
    977.30x = 721,787.37
  5. Step 5: Solve for x
    x = 721,787.37/977.30
  6. Step 6: Final answer
    x = 738.56

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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.