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Finding the Fourth Proportional to 5,788.99, 7,988.78 and 3,136.40

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Solution

The fourth proportional to 5,788.99, 7,988.78 and 3,136.40 is: 4,328.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,788.99 : 7,988.78 = 3,136.40 : x
  2. Step 2: Convert to fraction form
    5,788.99/7,988.78 = 3,136.40/x
  3. Step 3: Cross multiply
    5,788.99x = 7,988.78 × 3,136.40
  4. Step 4: Simplify right side
    5,788.99x = 25,056,009.59
  5. Step 5: Solve for x
    x = 25,056,009.59/5,788.99
  6. Step 6: Final answer
    x = 4,328.22

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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.