Home / 2,088.79-2,881.68-1,291.55

Finding the Fourth Proportional to 2,088.79, 2,881.68 and 1,291.55

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Solution

The fourth proportional to 2,088.79, 2,881.68 and 1,291.55 is: 1,781.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,088.79 : 2,881.68 = 1,291.55 : x
  2. Step 2: Convert to fraction form
    2,088.79/2,881.68 = 1,291.55/x
  3. Step 3: Cross multiply
    2,088.79x = 2,881.68 × 1,291.55
  4. Step 4: Simplify right side
    2,088.79x = 3,721,814.55
  5. Step 5: Solve for x
    x = 3,721,814.55/2,088.79
  6. Step 6: Final answer
    x = 1,781.81

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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.