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Finding the Fourth Proportional to 671,999.80, 1,007,999.70 and 376,473.40

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Solution

The fourth proportional to 671,999.80, 1,007,999.70 and 376,473.40 is: 564,710.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,999.80 : 1,007,999.70 = 376,473.40 : x
  2. Step 2: Convert to fraction form
    671,999.80/1,007,999.70 = 376,473.40/x
  3. Step 3: Cross multiply
    671,999.80x = 1,007,999.70 × 376,473.40
  4. Step 4: Simplify right side
    671,999.80x = 379,485,074,257.98
  5. Step 5: Solve for x
    x = 379,485,074,257.98/671,999.80
  6. Step 6: Final answer
    x = 564,710.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.