Home / 2,285.47-3,154.07-1,290.79

Finding the Fourth Proportional to 2,285.47, 3,154.07 and 1,290.79

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Solution

The fourth proportional to 2,285.47, 3,154.07 and 1,290.79 is: 1,781.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,285.47 : 3,154.07 = 1,290.79 : x
  2. Step 2: Convert to fraction form
    2,285.47/3,154.07 = 1,290.79/x
  3. Step 3: Cross multiply
    2,285.47x = 3,154.07 × 1,290.79
  4. Step 4: Simplify right side
    2,285.47x = 4,071,219.79
  5. Step 5: Solve for x
    x = 4,071,219.79/2,285.47
  6. Step 6: Final answer
    x = 1,781.35

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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.