Home / 2,385.20-3,577.70-1,291.70

Finding the Fourth Proportional to 2,385.20, 3,577.70 and 1,291.70

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Solution

The fourth proportional to 2,385.20, 3,577.70 and 1,291.70 is: 1,937.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,385.20 : 3,577.70 = 1,291.70 : x
  2. Step 2: Convert to fraction form
    2,385.20/3,577.70 = 1,291.70/x
  3. Step 3: Cross multiply
    2,385.20x = 3,577.70 × 1,291.70
  4. Step 4: Simplify right side
    2,385.20x = 4,621,315.09
  5. Step 5: Solve for x
    x = 4,621,315.09/2,385.20
  6. Step 6: Final answer
    x = 1,937.50

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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.