Home / 860,428.19-1,187,391.89-478,446.77

Finding the Fourth Proportional to 860,428.19, 1,187,391.89 and 478,446.77

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Solution

The fourth proportional to 860,428.19, 1,187,391.89 and 478,446.77 is: 660,257.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,428.19 : 1,187,391.89 = 478,446.77 : x
  2. Step 2: Convert to fraction form
    860,428.19/1,187,391.89 = 478,446.77/x
  3. Step 3: Cross multiply
    860,428.19x = 1,187,391.89 × 478,446.77
  4. Step 4: Simplify right side
    860,428.19x = 568,103,814,494.70
  5. Step 5: Solve for x
    x = 568,103,814,494.70/860,428.19
  6. Step 6: Final answer
    x = 660,257.09

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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.