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Finding the Fourth Proportional to 641,304.60, 884,988.69 and 354,824.69

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Solution

The fourth proportional to 641,304.60, 884,988.69 and 354,824.69 is: 489,651.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,304.60 : 884,988.69 = 354,824.69 : x
  2. Step 2: Convert to fraction form
    641,304.60/884,988.69 = 354,824.69/x
  3. Step 3: Cross multiply
    641,304.60x = 884,988.69 × 354,824.69
  4. Step 4: Simplify right side
    641,304.60x = 314,015,835,560.77
  5. Step 5: Solve for x
    x = 314,015,835,560.77/641,304.60
  6. Step 6: Final answer
    x = 489,651.62

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.