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Finding the Fourth Proportional to 858,658.90, 1,288,578.90 and 297,693.40

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Solution

The fourth proportional to 858,658.90, 1,288,578.90 and 297,693.40 is: 446,744.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,658.90 : 1,288,578.90 = 297,693.40 : x
  2. Step 2: Convert to fraction form
    858,658.90/1,288,578.90 = 297,693.40/x
  3. Step 3: Cross multiply
    858,658.90x = 1,288,578.90 × 297,693.40
  4. Step 4: Simplify right side
    858,658.90x = 383,601,433,909.26
  5. Step 5: Solve for x
    x = 383,601,433,909.26/858,658.90
  6. Step 6: Final answer
    x = 446,744.84

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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.