Home / 2,617.69-3,612.45-1,438.75

Finding the Fourth Proportional to 2,617.69, 3,612.45 and 1,438.75

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Solution

The fourth proportional to 2,617.69, 3,612.45 and 1,438.75 is: 1,985.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,617.69 : 3,612.45 = 1,438.75 : x
  2. Step 2: Convert to fraction form
    2,617.69/3,612.45 = 1,438.75/x
  3. Step 3: Cross multiply
    2,617.69x = 3,612.45 × 1,438.75
  4. Step 4: Simplify right side
    2,617.69x = 5,197,405.24
  5. Step 5: Solve for x
    x = 5,197,405.24/2,617.69
  6. Step 6: Final answer
    x = 1,985.49

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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.