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Finding the Fourth Proportional to 628,768.90, 867,701.22 and 342,288.90

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Solution

The fourth proportional to 628,768.90, 867,701.22 and 342,288.90 is: 472,358.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,768.90 : 867,701.22 = 342,288.90 : x
  2. Step 2: Convert to fraction form
    628,768.90/867,701.22 = 342,288.90/x
  3. Step 3: Cross multiply
    628,768.90x = 867,701.22 × 342,288.90
  4. Step 4: Simplify right side
    628,768.90x = 297,004,496,122.46
  5. Step 5: Solve for x
    x = 297,004,496,122.46/628,768.90
  6. Step 6: Final answer
    x = 472,358.76

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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.