Home / 860,815.20-1,187,897.76-478,838.64

Finding the Fourth Proportional to 860,815.20, 1,187,897.76 and 478,838.64

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Solution

The fourth proportional to 860,815.20, 1,187,897.76 and 478,838.64 is: 660,782.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,815.20 : 1,187,897.76 = 478,838.64 : x
  2. Step 2: Convert to fraction form
    860,815.20/1,187,897.76 = 478,838.64/x
  3. Step 3: Cross multiply
    860,815.20x = 1,187,897.76 × 478,838.64
  4. Step 4: Simplify right side
    860,815.20x = 568,811,347,857.45
  5. Step 5: Solve for x
    x = 568,811,347,857.45/860,815.20
  6. Step 6: Final answer
    x = 660,782.18

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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.