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Finding the Fourth Proportional to 860,626.22, 1,187,647.25 and 478,644.80

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Solution

The fourth proportional to 860,626.22, 1,187,647.25 and 478,644.80 is: 660,520.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,626.22 : 1,187,647.25 = 478,644.80 : x
  2. Step 2: Convert to fraction form
    860,626.22/1,187,647.25 = 478,644.80/x
  3. Step 3: Cross multiply
    860,626.22x = 1,187,647.25 × 478,644.80
  4. Step 4: Simplify right side
    860,626.22x = 568,461,172,115.34
  5. Step 5: Solve for x
    x = 568,461,172,115.34/860,626.22
  6. Step 6: Final answer
    x = 660,520.40

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1.5x scale

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.