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Finding the Fourth Proportional to 486,701.78, 671,644.50 and 268,909.76

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Solution

The fourth proportional to 486,701.78, 671,644.50 and 268,909.76 is: 371,093.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,701.78 : 671,644.50 = 268,909.76 : x
  2. Step 2: Convert to fraction form
    486,701.78/671,644.50 = 268,909.76/x
  3. Step 3: Cross multiply
    486,701.78x = 671,644.50 × 268,909.76
  4. Step 4: Simplify right side
    486,701.78x = 180,611,761,300.32
  5. Step 5: Solve for x
    x = 180,611,761,300.32/486,701.78
  6. Step 6: Final answer
    x = 371,093.28

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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.