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Finding the Fourth Proportional to 629,624.40, 868,856.34 and 343,138.32

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Solution

The fourth proportional to 629,624.40, 868,856.34 and 343,138.32 is: 473,517.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,624.40 : 868,856.34 = 343,138.32 : x
  2. Step 2: Convert to fraction form
    629,624.40/868,856.34 = 343,138.32/x
  3. Step 3: Cross multiply
    629,624.40x = 868,856.34 × 343,138.32
  4. Step 4: Simplify right side
    629,624.40x = 298,137,904,828.95
  5. Step 5: Solve for x
    x = 298,137,904,828.95/629,624.40
  6. Step 6: Final answer
    x = 473,517.08

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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.