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Finding the Fourth Proportional to 1,979.18, 2,967.40 and 868.06

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Solution

The fourth proportional to 1,979.18, 2,967.40 and 868.06 is: 1,301.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.18 : 2,967.40 = 868.06 : x
  2. Step 2: Convert to fraction form
    1,979.18/2,967.40 = 868.06/x
  3. Step 3: Cross multiply
    1,979.18x = 2,967.40 × 868.06
  4. Step 4: Simplify right side
    1,979.18x = 2,575,886.04
  5. Step 5: Solve for x
    x = 2,575,886.04/1,979.18
  6. Step 6: Final answer
    x = 1,301.49

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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.