Home / 787,832.72-1,087,711.94-642,984.52

Finding the Fourth Proportional to 787,832.72, 1,087,711.94 and 642,984.52

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Solution

The fourth proportional to 787,832.72, 1,087,711.94 and 642,984.52 is: 887,728.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    787,832.72 : 1,087,711.94 = 642,984.52 : x
  2. Step 2: Convert to fraction form
    787,832.72/1,087,711.94 = 642,984.52/x
  3. Step 3: Cross multiply
    787,832.72x = 1,087,711.94 × 642,984.52
  4. Step 4: Simplify right side
    787,832.72x = 699,381,939,639.17
  5. Step 5: Solve for x
    x = 699,381,939,639.17/787,832.72
  6. Step 6: Final answer
    x = 887,728.98

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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.