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Finding the Fourth Proportional to 860,618.88, 1,187,696.12 and 478,637.46

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Solution

The fourth proportional to 860,618.88, 1,187,696.12 and 478,637.46 is: 660,543.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,618.88 : 1,187,696.12 = 478,637.46 : x
  2. Step 2: Convert to fraction form
    860,618.88/1,187,696.12 = 478,637.46/x
  3. Step 3: Cross multiply
    860,618.88x = 1,187,696.12 × 478,637.46
  4. Step 4: Simplify right side
    860,618.88x = 568,475,851,735.47
  5. Step 5: Solve for x
    x = 568,475,851,735.47/860,618.88
  6. Step 6: Final answer
    x = 660,543.09

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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.