Home / 3,328.40-4,589.40-2,487.70

Finding the Fourth Proportional to 3,328.40, 4,589.40 and 2,487.70

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Solution

The fourth proportional to 3,328.40, 4,589.40 and 2,487.70 is: 3,430.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,328.40 : 4,589.40 = 2,487.70 : x
  2. Step 2: Convert to fraction form
    3,328.40/4,589.40 = 2,487.70/x
  3. Step 3: Cross multiply
    3,328.40x = 4,589.40 × 2,487.70
  4. Step 4: Simplify right side
    3,328.40x = 11,417,050.38
  5. Step 5: Solve for x
    x = 11,417,050.38/3,328.40
  6. Step 6: Final answer
    x = 3,430.19

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Half scale
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Double scale
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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.