Home / 1,385.20-2,078.10-460.60

Finding the Fourth Proportional to 1,385.20, 2,078.10 and 460.60

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Solution

The fourth proportional to 1,385.20, 2,078.10 and 460.60 is: 691.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.20 : 2,078.10 = 460.60 : x
  2. Step 2: Convert to fraction form
    1,385.20/2,078.10 = 460.60/x
  3. Step 3: Cross multiply
    1,385.20x = 2,078.10 × 460.60
  4. Step 4: Simplify right side
    1,385.20x = 957,172.86
  5. Step 5: Solve for x
    x = 957,172.86/1,385.20
  6. Step 6: Final answer
    x = 691.00

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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.