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Finding the Fourth Proportional to 399,059.32, 550,705.08 and 217,772.68

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Solution

The fourth proportional to 399,059.32, 550,705.08 and 217,772.68 is: 300,528.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,059.32 : 550,705.08 = 217,772.68 : x
  2. Step 2: Convert to fraction form
    399,059.32/550,705.08 = 217,772.68/x
  3. Step 3: Cross multiply
    399,059.32x = 550,705.08 × 217,772.68
  4. Step 4: Simplify right side
    399,059.32x = 119,928,521,161.21
  5. Step 5: Solve for x
    x = 119,928,521,161.21/399,059.32
  6. Step 6: Final answer
    x = 300,528.05

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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.