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Finding the Fourth Proportional to 628,867.69, 867,836.10 and 342,385.27

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Solution

The fourth proportional to 628,867.69, 867,836.10 and 342,385.27 is: 472,490.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,867.69 : 867,836.10 = 342,385.27 : x
  2. Step 2: Convert to fraction form
    628,867.69/867,836.10 = 342,385.27/x
  3. Step 3: Cross multiply
    628,867.69x = 867,836.10 × 342,385.27
  4. Step 4: Simplify right side
    628,867.69x = 297,134,297,414.25
  5. Step 5: Solve for x
    x = 297,134,297,414.25/628,867.69
  6. Step 6: Final answer
    x = 472,490.96

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1.5x scale

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.