Home / 1,579.18-2,178.18-1,247.08

Finding the Fourth Proportional to 1,579.18, 2,178.18 and 1,247.08

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Solution

The fourth proportional to 1,579.18, 2,178.18 and 1,247.08 is: 1,720.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,579.18 : 2,178.18 = 1,247.08 : x
  2. Step 2: Convert to fraction form
    1,579.18/2,178.18 = 1,247.08/x
  3. Step 3: Cross multiply
    1,579.18x = 2,178.18 × 1,247.08
  4. Step 4: Simplify right side
    1,579.18x = 2,716,364.71
  5. Step 5: Solve for x
    x = 2,716,364.71/1,579.18
  6. Step 6: Final answer
    x = 1,720.11

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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.