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Finding the Fourth Proportional to 398,706.42, 550,228.15 and 217,428.27

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Solution

The fourth proportional to 398,706.42, 550,228.15 and 217,428.27 is: 300,058.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,706.42 : 550,228.15 = 217,428.27 : x
  2. Step 2: Convert to fraction form
    398,706.42/550,228.15 = 217,428.27/x
  3. Step 3: Cross multiply
    398,706.42x = 550,228.15 × 217,428.27
  4. Step 4: Simplify right side
    398,706.42x = 119,635,152,776.87
  5. Step 5: Solve for x
    x = 119,635,152,776.87/398,706.42
  6. Step 6: Final answer
    x = 300,058.26

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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.