Home / 1,578.06-2,178.78-1,047.39

Finding the Fourth Proportional to 1,578.06, 2,178.78 and 1,047.39

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Solution

The fourth proportional to 1,578.06, 2,178.78 and 1,047.39 is: 1,446.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,578.06 : 2,178.78 = 1,047.39 : x
  2. Step 2: Convert to fraction form
    1,578.06/2,178.78 = 1,047.39/x
  3. Step 3: Cross multiply
    1,578.06x = 2,178.78 × 1,047.39
  4. Step 4: Simplify right side
    1,578.06x = 2,282,032.38
  5. Step 5: Solve for x
    x = 2,282,032.38/1,578.06
  6. Step 6: Final answer
    x = 1,446.10

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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.