Home / 687,851.49-949,188.78-381,912.06

Finding the Fourth Proportional to 687,851.49, 949,188.78 and 381,912.06

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Solution

The fourth proportional to 687,851.49, 949,188.78 and 381,912.06 is: 527,012.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,851.49 : 949,188.78 = 381,912.06 : x
  2. Step 2: Convert to fraction form
    687,851.49/949,188.78 = 381,912.06/x
  3. Step 3: Cross multiply
    687,851.49x = 949,188.78 × 381,912.06
  4. Step 4: Simplify right side
    687,851.49x = 362,506,642,298.69
  5. Step 5: Solve for x
    x = 362,506,642,298.69/687,851.49
  6. Step 6: Final answer
    x = 527,012.95

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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.