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Finding the Fourth Proportional to 1,295.02, 1,787.15 and 771.35

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Solution

The fourth proportional to 1,295.02, 1,787.15 and 771.35 is: 1,064.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295.02 : 1,787.15 = 771.35 : x
  2. Step 2: Convert to fraction form
    1,295.02/1,787.15 = 771.35/x
  3. Step 3: Cross multiply
    1,295.02x = 1,787.15 × 771.35
  4. Step 4: Simplify right side
    1,295.02x = 1,378,514.30
  5. Step 5: Solve for x
    x = 1,378,514.30/1,295.02
  6. Step 6: Final answer
    x = 1,064.47

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1.5x scale

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.