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Finding the Fourth Proportional to 999,918, 1,379,886.84 and 547,209

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Solution

The fourth proportional to 999,918, 1,379,886.84 and 547,209 is: 755,148.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,918 : 1,379,886.84 = 547,209 : x
  2. Step 2: Convert to fraction form
    999,918/1,379,886.84 = 547,209/x
  3. Step 3: Cross multiply
    999,918x = 1,379,886.84 × 547,209
  4. Step 4: Simplify right side
    999,918x = 755,086,497,829.56
  5. Step 5: Solve for x
    x = 755,086,497,829.56/999,918
  6. Step 6: Final answer
    x = 755,148.42

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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.