Home / 1,985.65-2,740.30-1,101.45

Finding the Fourth Proportional to 1,985.65, 2,740.30 and 1,101.45

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Solution

The fourth proportional to 1,985.65, 2,740.30 and 1,101.45 is: 1,520.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.65 : 2,740.30 = 1,101.45 : x
  2. Step 2: Convert to fraction form
    1,985.65/2,740.30 = 1,101.45/x
  3. Step 3: Cross multiply
    1,985.65x = 2,740.30 × 1,101.45
  4. Step 4: Simplify right side
    1,985.65x = 3,018,310.96
  5. Step 5: Solve for x
    x = 3,018,310.96/1,985.65
  6. Step 6: Final answer
    x = 1,520.06

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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.