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Finding the Fourth Proportional to 661,493.36, 991,657.50 and 262,414.40

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Solution

The fourth proportional to 661,493.36, 991,657.50 and 262,414.40 is: 393,390.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,493.36 : 991,657.50 = 262,414.40 : x
  2. Step 2: Convert to fraction form
    661,493.36/991,657.50 = 262,414.40/x
  3. Step 3: Cross multiply
    661,493.36x = 991,657.50 × 262,414.40
  4. Step 4: Simplify right side
    661,493.36x = 260,225,207,868.00
  5. Step 5: Solve for x
    x = 260,225,207,868.00/661,493.36
  6. Step 6: Final answer
    x = 393,390.51

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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.