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Finding the Fourth Proportional to 628,815.93, 867,765.74 and 342,335.94

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Solution

The fourth proportional to 628,815.93, 867,765.74 and 342,335.94 is: 472,423.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,815.93 : 867,765.74 = 342,335.94 : x
  2. Step 2: Convert to fraction form
    628,815.93/867,765.74 = 342,335.94/x
  3. Step 3: Cross multiply
    628,815.93x = 867,765.74 × 342,335.94
  4. Step 4: Simplify right side
    628,815.93x = 297,067,398,591.02
  5. Step 5: Solve for x
    x = 297,067,398,591.02/628,815.93
  6. Step 6: Final answer
    x = 472,423.46

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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.