Home / 1,988.19-2,740.77-1,515.27

Finding the Fourth Proportional to 1,988.19, 2,740.77 and 1,515.27

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Solution

The fourth proportional to 1,988.19, 2,740.77 and 1,515.27 is: 2,088.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.19 : 2,740.77 = 1,515.27 : x
  2. Step 2: Convert to fraction form
    1,988.19/2,740.77 = 1,515.27/x
  3. Step 3: Cross multiply
    1,988.19x = 2,740.77 × 1,515.27
  4. Step 4: Simplify right side
    1,988.19x = 4,152,985.28
  5. Step 5: Solve for x
    x = 4,152,985.28/1,988.19
  6. Step 6: Final answer
    x = 2,088.83

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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.