Home / 784,650.84-1,079,420.37-687,416.82

Finding the Fourth Proportional to 784,650.84, 1,079,420.37 and 687,416.82

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Solution

The fourth proportional to 784,650.84, 1,079,420.37 and 687,416.82 is: 945,658.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    784,650.84 : 1,079,420.37 = 687,416.82 : x
  2. Step 2: Convert to fraction form
    784,650.84/1,079,420.37 = 687,416.82/x
  3. Step 3: Cross multiply
    784,650.84x = 1,079,420.37 × 687,416.82
  4. Step 4: Simplify right side
    784,650.84x = 742,011,718,188.62
  5. Step 5: Solve for x
    x = 742,011,718,188.62/784,650.84
  6. Step 6: Final answer
    x = 945,658.48

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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.