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Finding the Fourth Proportional to 641,632.40, 963,139.80 and 361,696.40

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Solution

The fourth proportional to 641,632.40, 963,139.80 and 361,696.40 is: 542,934.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,632.40 : 963,139.80 = 361,696.40 : x
  2. Step 2: Convert to fraction form
    641,632.40/963,139.80 = 361,696.40/x
  3. Step 3: Cross multiply
    641,632.40x = 963,139.80 × 361,696.40
  4. Step 4: Simplify right side
    641,632.40x = 348,364,198,356.72
  5. Step 5: Solve for x
    x = 348,364,198,356.72/641,632.40
  6. Step 6: Final answer
    x = 542,934.24

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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.