Home / 2,285.61-3,154.13-1,290.87

Finding the Fourth Proportional to 2,285.61, 3,154.13 and 1,290.87

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Solution

The fourth proportional to 2,285.61, 3,154.13 and 1,290.87 is: 1,781.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,285.61 : 3,154.13 = 1,290.87 : x
  2. Step 2: Convert to fraction form
    2,285.61/3,154.13 = 1,290.87/x
  3. Step 3: Cross multiply
    2,285.61x = 3,154.13 × 1,290.87
  4. Step 4: Simplify right side
    2,285.61x = 4,071,565.34
  5. Step 5: Solve for x
    x = 4,071,565.34/2,285.61
  6. Step 6: Final answer
    x = 1,781.39

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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.