Home / 860,432.20-1,187,347.60-478,450.76

Finding the Fourth Proportional to 860,432.20, 1,187,347.60 and 478,450.76

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Solution

The fourth proportional to 860,432.20, 1,187,347.60 and 478,450.76 is: 660,234.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,432.20 : 1,187,347.60 = 478,450.76 : x
  2. Step 2: Convert to fraction form
    860,432.20/1,187,347.60 = 478,450.76/x
  3. Step 3: Cross multiply
    860,432.20x = 1,187,347.60 × 478,450.76
  4. Step 4: Simplify right side
    860,432.20x = 568,087,361,604.18
  5. Step 5: Solve for x
    x = 568,087,361,604.18/860,432.20
  6. Step 6: Final answer
    x = 660,234.89

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Half scale
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Double scale
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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.