Home / 2,165.76-2,988.16-1,281.60

Finding the Fourth Proportional to 2,165.76, 2,988.16 and 1,281.60

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Solution

The fourth proportional to 2,165.76, 2,988.16 and 1,281.60 is: 1,768.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.76 : 2,988.16 = 1,281.60 : x
  2. Step 2: Convert to fraction form
    2,165.76/2,988.16 = 1,281.60/x
  3. Step 3: Cross multiply
    2,165.76x = 2,988.16 × 1,281.60
  4. Step 4: Simplify right side
    2,165.76x = 3,829,625.86
  5. Step 5: Solve for x
    x = 3,829,625.86/2,165.76
  6. Step 6: Final answer
    x = 1,768.26

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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.