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Finding the Fourth Proportional to 2,913.96, 4,368.67 and 1,987.22

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Solution

The fourth proportional to 2,913.96, 4,368.67 and 1,987.22 is: 2,979.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,913.96 : 4,368.67 = 1,987.22 : x
  2. Step 2: Convert to fraction form
    2,913.96/4,368.67 = 1,987.22/x
  3. Step 3: Cross multiply
    2,913.96x = 4,368.67 × 1,987.22
  4. Step 4: Simplify right side
    2,913.96x = 8,681,498.46
  5. Step 5: Solve for x
    x = 8,681,498.46/2,913.96
  6. Step 6: Final answer
    x = 2,979.28

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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.