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Finding the Fourth Proportional to 354,015.28, 488,580.42 and 218,022.40

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Solution

The fourth proportional to 354,015.28, 488,580.42 and 218,022.40 is: 300,895.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,015.28 : 488,580.42 = 218,022.40 : x
  2. Step 2: Convert to fraction form
    354,015.28/488,580.42 = 218,022.40/x
  3. Step 3: Cross multiply
    354,015.28x = 488,580.42 × 218,022.40
  4. Step 4: Simplify right side
    354,015.28x = 106,521,475,761.41
  5. Step 5: Solve for x
    x = 106,521,475,761.41/354,015.28
  6. Step 6: Final answer
    x = 300,895.14

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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.