Home / 687,056.99-948,141.05-381,139.43

Finding the Fourth Proportional to 687,056.99, 948,141.05 and 381,139.43

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Solution

The fourth proportional to 687,056.99, 948,141.05 and 381,139.43 is: 525,973.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,056.99 : 948,141.05 = 381,139.43 : x
  2. Step 2: Convert to fraction form
    687,056.99/948,141.05 = 381,139.43/x
  3. Step 3: Cross multiply
    687,056.99x = 948,141.05 × 381,139.43
  4. Step 4: Simplify right side
    687,056.99x = 361,373,932,710.20
  5. Step 5: Solve for x
    x = 361,373,932,710.20/687,056.99
  6. Step 6: Final answer
    x = 525,973.74

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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.