Home / 1,588.18-2,192.78-990.91

Finding the Fourth Proportional to 1,588.18, 2,192.78 and 990.91

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Solution

The fourth proportional to 1,588.18, 2,192.78 and 990.91 is: 1,368.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,588.18 : 2,192.78 = 990.91 : x
  2. Step 2: Convert to fraction form
    1,588.18/2,192.78 = 990.91/x
  3. Step 3: Cross multiply
    1,588.18x = 2,192.78 × 990.91
  4. Step 4: Simplify right side
    1,588.18x = 2,172,847.63
  5. Step 5: Solve for x
    x = 2,172,847.63/1,588.18
  6. Step 6: Final answer
    x = 1,368.14

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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.