Home / 2,909.95-4,015.85-1,731.20

Finding the Fourth Proportional to 2,909.95, 4,015.85 and 1,731.20

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Solution

The fourth proportional to 2,909.95, 4,015.85 and 1,731.20 is: 2,389.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,909.95 : 4,015.85 = 1,731.20 : x
  2. Step 2: Convert to fraction form
    2,909.95/4,015.85 = 1,731.20/x
  3. Step 3: Cross multiply
    2,909.95x = 4,015.85 × 1,731.20
  4. Step 4: Simplify right side
    2,909.95x = 6,952,210.78
  5. Step 5: Solve for x
    x = 6,952,210.78/2,909.95
  6. Step 6: Final answer
    x = 2,389.12

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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.