Home / 3,415.20-4,720.50-3,115.32

Finding the Fourth Proportional to 3,415.20, 4,720.50 and 3,115.32

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Solution

The fourth proportional to 3,415.20, 4,720.50 and 3,115.32 is: 4,306.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,415.20 : 4,720.50 = 3,115.32 : x
  2. Step 2: Convert to fraction form
    3,415.20/4,720.50 = 3,115.32/x
  3. Step 3: Cross multiply
    3,415.20x = 4,720.50 × 3,115.32
  4. Step 4: Simplify right side
    3,415.20x = 14,705,868.06
  5. Step 5: Solve for x
    x = 14,705,868.06/3,415.20
  6. Step 6: Final answer
    x = 4,306.00

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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.