Home / 3,139.41-4,707.66-947.73

Finding the Fourth Proportional to 3,139.41, 4,707.66 and 947.73

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Solution

The fourth proportional to 3,139.41, 4,707.66 and 947.73 is: 1,421.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.41 : 4,707.66 = 947.73 : x
  2. Step 2: Convert to fraction form
    3,139.41/4,707.66 = 947.73/x
  3. Step 3: Cross multiply
    3,139.41x = 4,707.66 × 947.73
  4. Step 4: Simplify right side
    3,139.41x = 4,461,590.61
  5. Step 5: Solve for x
    x = 4,461,590.61/3,139.41
  6. Step 6: Final answer
    x = 1,421.16

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1.5x scale

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.