Home / 3,129.65-4,319.37-1,803.32

Finding the Fourth Proportional to 3,129.65, 4,319.37 and 1,803.32

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Solution

The fourth proportional to 3,129.65, 4,319.37 and 1,803.32 is: 2,488.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.65 : 4,319.37 = 1,803.32 : x
  2. Step 2: Convert to fraction form
    3,129.65/4,319.37 = 1,803.32/x
  3. Step 3: Cross multiply
    3,129.65x = 4,319.37 × 1,803.32
  4. Step 4: Simplify right side
    3,129.65x = 7,789,184.71
  5. Step 5: Solve for x
    x = 7,789,184.71/3,129.65
  6. Step 6: Final answer
    x = 2,488.84

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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.