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Finding the Fourth Proportional to 671,625.70, 1,007,438.55 and 665,404.90

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Solution

The fourth proportional to 671,625.70, 1,007,438.55 and 665,404.90 is: 998,107.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,625.70 : 1,007,438.55 = 665,404.90 : x
  2. Step 2: Convert to fraction form
    671,625.70/1,007,438.55 = 665,404.90/x
  3. Step 3: Cross multiply
    671,625.70x = 1,007,438.55 × 665,404.90
  4. Step 4: Simplify right side
    671,625.70x = 670,354,547,618.90
  5. Step 5: Solve for x
    x = 670,354,547,618.90/671,625.70
  6. Step 6: Final answer
    x = 998,107.35

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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.