Home / 3,139.02-4,707.66-947.82

Finding the Fourth Proportional to 3,139.02, 4,707.66 and 947.82

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Solution

The fourth proportional to 3,139.02, 4,707.66 and 947.82 is: 1,421.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.02 : 4,707.66 = 947.82 : x
  2. Step 2: Convert to fraction form
    3,139.02/4,707.66 = 947.82/x
  3. Step 3: Cross multiply
    3,139.02x = 4,707.66 × 947.82
  4. Step 4: Simplify right side
    3,139.02x = 4,462,014.30
  5. Step 5: Solve for x
    x = 4,462,014.30/3,139.02
  6. Step 6: Final answer
    x = 1,421.47

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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.