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Finding the Fourth Proportional to 2,885.76, 4,321.70 and 1,649.42

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Solution

The fourth proportional to 2,885.76, 4,321.70 and 1,649.42 is: 2,470.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,885.76 : 4,321.70 = 1,649.42 : x
  2. Step 2: Convert to fraction form
    2,885.76/4,321.70 = 1,649.42/x
  3. Step 3: Cross multiply
    2,885.76x = 4,321.70 × 1,649.42
  4. Step 4: Simplify right side
    2,885.76x = 7,128,298.41
  5. Step 5: Solve for x
    x = 7,128,298.41/2,885.76
  6. Step 6: Final answer
    x = 2,470.16

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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.