Home / 1,578.60-2,177.40-1,018.88

Finding the Fourth Proportional to 1,578.60, 2,177.40 and 1,018.88

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Solution

The fourth proportional to 1,578.60, 2,177.40 and 1,018.88 is: 1,405.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.60 : 2,177.40 = 1,018.88 : x
  2. Step 2: Convert to fraction form
    1,578.60/2,177.40 = 1,018.88/x
  3. Step 3: Cross multiply
    1,578.60x = 2,177.40 × 1,018.88
  4. Step 4: Simplify right side
    1,578.60x = 2,218,509.31
  5. Step 5: Solve for x
    x = 2,218,509.31/1,578.60
  6. Step 6: Final answer
    x = 1,405.37

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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.