Home / 1,985.31-2,739.80-1,088.99

Finding the Fourth Proportional to 1,985.31, 2,739.80 and 1,088.99

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Solution

The fourth proportional to 1,985.31, 2,739.80 and 1,088.99 is: 1,502.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.31 : 2,739.80 = 1,088.99 : x
  2. Step 2: Convert to fraction form
    1,985.31/2,739.80 = 1,088.99/x
  3. Step 3: Cross multiply
    1,985.31x = 2,739.80 × 1,088.99
  4. Step 4: Simplify right side
    1,985.31x = 2,983,613.11
  5. Step 5: Solve for x
    x = 2,983,613.11/1,985.31
  6. Step 6: Final answer
    x = 1,502.85

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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.