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Finding the Fourth Proportional to 399,336.52, 551,106.68 and 218,065.28

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Solution

The fourth proportional to 399,336.52, 551,106.68 and 218,065.28 is: 300,942.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,336.52 : 551,106.68 = 218,065.28 : x
  2. Step 2: Convert to fraction form
    399,336.52/551,106.68 = 218,065.28/x
  3. Step 3: Cross multiply
    399,336.52x = 551,106.68 × 218,065.28
  4. Step 4: Simplify right side
    399,336.52x = 120,177,232,484.07
  5. Step 5: Solve for x
    x = 120,177,232,484.07/399,336.52
  6. Step 6: Final answer
    x = 300,942.25

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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.