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Finding the Fourth Proportional to 386,470.80, 579,706.20 and 161,792.40

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Solution

The fourth proportional to 386,470.80, 579,706.20 and 161,792.40 is: 242,688.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,470.80 : 579,706.20 = 161,792.40 : x
  2. Step 2: Convert to fraction form
    386,470.80/579,706.20 = 161,792.40/x
  3. Step 3: Cross multiply
    386,470.80x = 579,706.20 × 161,792.40
  4. Step 4: Simplify right side
    386,470.80x = 93,792,057,392.88
  5. Step 5: Solve for x
    x = 93,792,057,392.88/386,470.80
  6. Step 6: Final answer
    x = 242,688.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.