Home / 2,985.09-4,119.36-1,658.78

Finding the Fourth Proportional to 2,985.09, 4,119.36 and 1,658.78

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Solution

The fourth proportional to 2,985.09, 4,119.36 and 1,658.78 is: 2,289.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.09 : 4,119.36 = 1,658.78 : x
  2. Step 2: Convert to fraction form
    2,985.09/4,119.36 = 1,658.78/x
  3. Step 3: Cross multiply
    2,985.09x = 4,119.36 × 1,658.78
  4. Step 4: Simplify right side
    2,985.09x = 6,833,100.61
  5. Step 5: Solve for x
    x = 6,833,100.61/2,985.09
  6. Step 6: Final answer
    x = 2,289.08

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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.