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Finding the Fourth Proportional to 399,628.29, 551,480.59 and 218,336.32

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Solution

The fourth proportional to 399,628.29, 551,480.59 and 218,336.32 is: 301,300.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,628.29 : 551,480.59 = 218,336.32 : x
  2. Step 2: Convert to fraction form
    399,628.29/551,480.59 = 218,336.32/x
  3. Step 3: Cross multiply
    399,628.29x = 551,480.59 × 218,336.32
  4. Step 4: Simplify right side
    399,628.29x = 120,408,238,722.94
  5. Step 5: Solve for x
    x = 120,408,238,722.94/399,628.29
  6. Step 6: Final answer
    x = 301,300.59

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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.