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Finding the Fourth Proportional to 661,696.60, 992,058.90 and 262,139.80

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Solution

The fourth proportional to 661,696.60, 992,058.90 and 262,139.80 is: 393,017.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,696.60 : 992,058.90 = 262,139.80 : x
  2. Step 2: Convert to fraction form
    661,696.60/992,058.90 = 262,139.80/x
  3. Step 3: Cross multiply
    661,696.60x = 992,058.90 × 262,139.80
  4. Step 4: Simplify right side
    661,696.60x = 260,058,121,634.22
  5. Step 5: Solve for x
    x = 260,058,121,634.22/661,696.60
  6. Step 6: Final answer
    x = 393,017.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.