Home / 3,130.32-4,318.56-1,803.72

Finding the Fourth Proportional to 3,130.32, 4,318.56 and 1,803.72

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Solution

The fourth proportional to 3,130.32, 4,318.56 and 1,803.72 is: 2,488.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.32 : 4,318.56 = 1,803.72 : x
  2. Step 2: Convert to fraction form
    3,130.32/4,318.56 = 1,803.72/x
  3. Step 3: Cross multiply
    3,130.32x = 4,318.56 × 1,803.72
  4. Step 4: Simplify right side
    3,130.32x = 7,789,473.04
  5. Step 5: Solve for x
    x = 7,789,473.04/3,130.32
  6. Step 6: Final answer
    x = 2,488.40

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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.