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Finding the Fourth Proportional to 404,428.90, 606,643.35 and 396,555.70

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Solution

The fourth proportional to 404,428.90, 606,643.35 and 396,555.70 is: 594,833.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,428.90 : 606,643.35 = 396,555.70 : x
  2. Step 2: Convert to fraction form
    404,428.90/606,643.35 = 396,555.70/x
  3. Step 3: Cross multiply
    404,428.90x = 606,643.35 × 396,555.70
  4. Step 4: Simplify right side
    404,428.90x = 240,567,878,309.60
  5. Step 5: Solve for x
    x = 240,567,878,309.60/404,428.90
  6. Step 6: Final answer
    x = 594,833.55

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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.