Home / 3,129.84-4,318.28-1,785.48

Finding the Fourth Proportional to 3,129.84, 4,318.28 and 1,785.48

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Solution

The fourth proportional to 3,129.84, 4,318.28 and 1,785.48 is: 2,463.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.84 : 4,318.28 = 1,785.48 : x
  2. Step 2: Convert to fraction form
    3,129.84/4,318.28 = 1,785.48/x
  3. Step 3: Cross multiply
    3,129.84x = 4,318.28 × 1,785.48
  4. Step 4: Simplify right side
    3,129.84x = 7,710,202.57
  5. Step 5: Solve for x
    x = 7,710,202.57/3,129.84
  6. Step 6: Final answer
    x = 2,463.45

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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.