Home / 399,128.33-550,792.85-217,838.79

Finding the Fourth Proportional to 399,128.33, 550,792.85 and 217,838.79

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Solution

The fourth proportional to 399,128.33, 550,792.85 and 217,838.79 is: 300,615.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,128.33 : 550,792.85 = 217,838.79 : x
  2. Step 2: Convert to fraction form
    399,128.33/550,792.85 = 217,838.79/x
  3. Step 3: Cross multiply
    399,128.33x = 550,792.85 × 217,838.79
  4. Step 4: Simplify right side
    399,128.33x = 119,984,046,895.46
  5. Step 5: Solve for x
    x = 119,984,046,895.46/399,128.33
  6. Step 6: Final answer
    x = 300,615.21

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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.