Home / 3,129.85-4,318.26-1,785.46

Finding the Fourth Proportional to 3,129.85, 4,318.26 and 1,785.46

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Solution

The fourth proportional to 3,129.85, 4,318.26 and 1,785.46 is: 2,463.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.85 : 4,318.26 = 1,785.46 : x
  2. Step 2: Convert to fraction form
    3,129.85/4,318.26 = 1,785.46/x
  3. Step 3: Cross multiply
    3,129.85x = 4,318.26 × 1,785.46
  4. Step 4: Simplify right side
    3,129.85x = 7,710,080.50
  5. Step 5: Solve for x
    x = 7,710,080.50/3,129.85
  6. Step 6: Final answer
    x = 2,463.40

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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.