Home / 2,385.10-3,291.48-1,390.46

Finding the Fourth Proportional to 2,385.10, 3,291.48 and 1,390.46

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Solution

The fourth proportional to 2,385.10, 3,291.48 and 1,390.46 is: 1,918.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,385.10 : 3,291.48 = 1,390.46 : x
  2. Step 2: Convert to fraction form
    2,385.10/3,291.48 = 1,390.46/x
  3. Step 3: Cross multiply
    2,385.10x = 3,291.48 × 1,390.46
  4. Step 4: Simplify right side
    2,385.10x = 4,576,671.28
  5. Step 5: Solve for x
    x = 4,576,671.28/2,385.10
  6. Step 6: Final answer
    x = 1,918.86

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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.