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Finding the Fourth Proportional to 611,863.15, 917,794.73 and 521,321.35

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Solution

The fourth proportional to 611,863.15, 917,794.73 and 521,321.35 is: 781,982.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,863.15 : 917,794.73 = 521,321.35 : x
  2. Step 2: Convert to fraction form
    611,863.15/917,794.73 = 521,321.35/x
  3. Step 3: Cross multiply
    611,863.15x = 917,794.73 × 521,321.35
  4. Step 4: Simplify right side
    611,863.15x = 478,465,987,666.49
  5. Step 5: Solve for x
    x = 478,465,987,666.49/611,863.15
  6. Step 6: Final answer
    x = 781,982.03

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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.