Home / 1,142.58-1,715.85-1,090.64

Finding the Fourth Proportional to 1,142.58, 1,715.85 and 1,090.64

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Solution

The fourth proportional to 1,142.58, 1,715.85 and 1,090.64 is: 1,637.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,142.58 : 1,715.85 = 1,090.64 : x
  2. Step 2: Convert to fraction form
    1,142.58/1,715.85 = 1,090.64/x
  3. Step 3: Cross multiply
    1,142.58x = 1,715.85 × 1,090.64
  4. Step 4: Simplify right side
    1,142.58x = 1,871,374.64
  5. Step 5: Solve for x
    x = 1,871,374.64/1,142.58
  6. Step 6: Final answer
    x = 1,637.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.