Home / 1,587.85-2,381.78-1,069.45

Finding the Fourth Proportional to 1,587.85, 2,381.78 and 1,069.45

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Solution

The fourth proportional to 1,587.85, 2,381.78 and 1,069.45 is: 1,604.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.85 : 2,381.78 = 1,069.45 : x
  2. Step 2: Convert to fraction form
    1,587.85/2,381.78 = 1,069.45/x
  3. Step 3: Cross multiply
    1,587.85x = 2,381.78 × 1,069.45
  4. Step 4: Simplify right side
    1,587.85x = 2,547,189.27
  5. Step 5: Solve for x
    x = 2,547,189.27/1,587.85
  6. Step 6: Final answer
    x = 1,604.18

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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.