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Finding the Fourth Proportional to 1,987.22, 2,981.44 and 948.55

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Solution

The fourth proportional to 1,987.22, 2,981.44 and 948.55 is: 1,423.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.22 : 2,981.44 = 948.55 : x
  2. Step 2: Convert to fraction form
    1,987.22/2,981.44 = 948.55/x
  3. Step 3: Cross multiply
    1,987.22x = 2,981.44 × 948.55
  4. Step 4: Simplify right side
    1,987.22x = 2,828,044.91
  5. Step 5: Solve for x
    x = 2,828,044.91/1,987.22
  6. Step 6: Final answer
    x = 1,423.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.