Home / 2,187.03-3,281.68-870.50

Finding the Fourth Proportional to 2,187.03, 3,281.68 and 870.50

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Solution

The fourth proportional to 2,187.03, 3,281.68 and 870.50 is: 1,306.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.03 : 3,281.68 = 870.50 : x
  2. Step 2: Convert to fraction form
    2,187.03/3,281.68 = 870.50/x
  3. Step 3: Cross multiply
    2,187.03x = 3,281.68 × 870.50
  4. Step 4: Simplify right side
    2,187.03x = 2,856,700.26
  5. Step 5: Solve for x
    x = 2,856,700.26/2,187.03
  6. Step 6: Final answer
    x = 1,306.20

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1.5x scale

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.