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Finding the Fourth Proportional to 407,761.20, 611,641.80 and 401,856.30

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Solution

The fourth proportional to 407,761.20, 611,641.80 and 401,856.30 is: 602,784.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,761.20 : 611,641.80 = 401,856.30 : x
  2. Step 2: Convert to fraction form
    407,761.20/611,641.80 = 401,856.30/x
  3. Step 3: Cross multiply
    407,761.20x = 611,641.80 × 401,856.30
  4. Step 4: Simplify right side
    407,761.20x = 245,792,110,673.34
  5. Step 5: Solve for x
    x = 245,792,110,673.34/407,761.20
  6. Step 6: Final answer
    x = 602,784.45

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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.