Home / 3,130.89-4,316.79-1,949.91

Finding the Fourth Proportional to 3,130.89, 4,316.79 and 1,949.91

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Solution

The fourth proportional to 3,130.89, 4,316.79 and 1,949.91 is: 2,688.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.89 : 4,316.79 = 1,949.91 : x
  2. Step 2: Convert to fraction form
    3,130.89/4,316.79 = 1,949.91/x
  3. Step 3: Cross multiply
    3,130.89x = 4,316.79 × 1,949.91
  4. Step 4: Simplify right side
    3,130.89x = 8,417,351.99
  5. Step 5: Solve for x
    x = 8,417,351.99/3,130.89
  6. Step 6: Final answer
    x = 2,688.49

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1.5x scale

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.