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Finding the Fourth Proportional to 641,643.66, 961,924.14 and 404,463.42

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Solution

The fourth proportional to 641,643.66, 961,924.14 and 404,463.42 is: 606,353.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,643.66 : 961,924.14 = 404,463.42 : x
  2. Step 2: Convert to fraction form
    641,643.66/961,924.14 = 404,463.42/x
  3. Step 3: Cross multiply
    641,643.66x = 961,924.14 × 404,463.42
  4. Step 4: Simplify right side
    641,643.66x = 389,063,127,444.96
  5. Step 5: Solve for x
    x = 389,063,127,444.96/641,643.66
  6. Step 6: Final answer
    x = 606,353.89

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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.