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Finding the Fourth Proportional to 641,031.88, 884,518.32 and 354,496

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Solution

The fourth proportional to 641,031.88, 884,518.32 and 354,496 is: 489,146.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,031.88 : 884,518.32 = 354,496 : x
  2. Step 2: Convert to fraction form
    641,031.88/884,518.32 = 354,496/x
  3. Step 3: Cross multiply
    641,031.88x = 884,518.32 × 354,496
  4. Step 4: Simplify right side
    641,031.88x = 313,558,206,366.72
  5. Step 5: Solve for x
    x = 313,558,206,366.72/641,031.88
  6. Step 6: Final answer
    x = 489,146.04

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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.