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Finding the Fourth Proportional to 1,586.08, 2,378.94 and 763.66

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Solution

The fourth proportional to 1,586.08, 2,378.94 and 763.66 is: 1,145.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,586.08 : 2,378.94 = 763.66 : x
  2. Step 2: Convert to fraction form
    1,586.08/2,378.94 = 763.66/x
  3. Step 3: Cross multiply
    1,586.08x = 2,378.94 × 763.66
  4. Step 4: Simplify right side
    1,586.08x = 1,816,701.32
  5. Step 5: Solve for x
    x = 1,816,701.32/1,586.08
  6. Step 6: Final answer
    x = 1,145.40

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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.