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Finding the Fourth Proportional to 661,710.40, 993,487.20 and 412,878.40

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Solution

The fourth proportional to 661,710.40, 993,487.20 and 412,878.40 is: 619,892.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,710.40 : 993,487.20 = 412,878.40 : x
  2. Step 2: Convert to fraction form
    661,710.40/993,487.20 = 412,878.40/x
  3. Step 3: Cross multiply
    661,710.40x = 993,487.20 × 412,878.40
  4. Step 4: Simplify right side
    661,710.40x = 410,189,405,556.48
  5. Step 5: Solve for x
    x = 410,189,405,556.48/661,710.40
  6. Step 6: Final answer
    x = 619,892.64

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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.