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Finding the Fourth Proportional to 4,988.99, 6,878.41 and 4,089.42

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Solution

The fourth proportional to 4,988.99, 6,878.41 and 4,089.42 is: 5,638.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,988.99 : 6,878.41 = 4,089.42 : x
  2. Step 2: Convert to fraction form
    4,988.99/6,878.41 = 4,089.42/x
  3. Step 3: Cross multiply
    4,988.99x = 6,878.41 × 4,089.42
  4. Step 4: Simplify right side
    4,988.99x = 28,128,707.42
  5. Step 5: Solve for x
    x = 28,128,707.42/4,988.99
  6. Step 6: Final answer
    x = 5,638.16

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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.