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Finding the Fourth Proportional to 641,403.40, 961,808.56 and 360,920.64

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Solution

The fourth proportional to 641,403.40, 961,808.56 and 360,920.64 is: 541,214.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,403.40 : 961,808.56 = 360,920.64 : x
  2. Step 2: Convert to fraction form
    641,403.40/961,808.56 = 360,920.64/x
  3. Step 3: Cross multiply
    641,403.40x = 961,808.56 × 360,920.64
  4. Step 4: Simplify right side
    641,403.40x = 347,136,561,032.68
  5. Step 5: Solve for x
    x = 347,136,561,032.68/641,403.40
  6. Step 6: Final answer
    x = 541,214.10

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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.