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Finding the Fourth Proportional to 397,154.47, 548,076.84 and 215,866.81

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Solution

The fourth proportional to 397,154.47, 548,076.84 and 215,866.81 is: 297,898.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,154.47 : 548,076.84 = 215,866.81 : x
  2. Step 2: Convert to fraction form
    397,154.47/548,076.84 = 215,866.81/x
  3. Step 3: Cross multiply
    397,154.47x = 548,076.84 × 215,866.81
  4. Step 4: Simplify right side
    397,154.47x = 118,311,599,085.68
  5. Step 5: Solve for x
    x = 118,311,599,085.68/397,154.47
  6. Step 6: Final answer
    x = 297,898.19

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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.