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Finding the Fourth Proportional to 486,307.76, 671,138.52 and 271,490

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Solution

The fourth proportional to 486,307.76, 671,138.52 and 271,490 is: 374,675.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,307.76 : 671,138.52 = 271,490 : x
  2. Step 2: Convert to fraction form
    486,307.76/671,138.52 = 271,490/x
  3. Step 3: Cross multiply
    486,307.76x = 671,138.52 × 271,490
  4. Step 4: Simplify right side
    486,307.76x = 182,207,396,794.80
  5. Step 5: Solve for x
    x = 182,207,396,794.80/486,307.76
  6. Step 6: Final answer
    x = 374,675.08

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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.