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Finding the Fourth Proportional to 641,332.60, 961,364.40 and 303,779.95

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Solution

The fourth proportional to 641,332.60, 961,364.40 and 303,779.95 is: 455,369.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,332.60 : 961,364.40 = 303,779.95 : x
  2. Step 2: Convert to fraction form
    641,332.60/961,364.40 = 303,779.95/x
  3. Step 3: Cross multiply
    641,332.60x = 961,364.40 × 303,779.95
  4. Step 4: Simplify right side
    641,332.60x = 292,043,229,363.78
  5. Step 5: Solve for x
    x = 292,043,229,363.78/641,332.60
  6. Step 6: Final answer
    x = 455,369.38

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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.