Home / 782,367.85-1,078,607.50-668,865.79

Finding the Fourth Proportional to 782,367.85, 1,078,607.50 and 668,865.79

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Solution

The fourth proportional to 782,367.85, 1,078,607.50 and 668,865.79 is: 922,128.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,367.85 : 1,078,607.50 = 668,865.79 : x
  2. Step 2: Convert to fraction form
    782,367.85/1,078,607.50 = 668,865.79/x
  3. Step 3: Cross multiply
    782,367.85x = 1,078,607.50 × 668,865.79
  4. Step 4: Simplify right side
    782,367.85x = 721,443,657,587.43
  5. Step 5: Solve for x
    x = 721,443,657,587.43/782,367.85
  6. Step 6: Final answer
    x = 922,128.46

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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.