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Finding the Fourth Proportional to 400,725.57, 553,001.25 and 219,448.56

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Solution

The fourth proportional to 400,725.57, 553,001.25 and 219,448.56 is: 302,838.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,725.57 : 553,001.25 = 219,448.56 : x
  2. Step 2: Convert to fraction form
    400,725.57/553,001.25 = 219,448.56/x
  3. Step 3: Cross multiply
    400,725.57x = 553,001.25 × 219,448.56
  4. Step 4: Simplify right side
    400,725.57x = 121,355,327,990.70
  5. Step 5: Solve for x
    x = 121,355,327,990.70/400,725.57
  6. Step 6: Final answer
    x = 302,838.99

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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.