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Finding the Fourth Proportional to 611,926.80, 917,637.54 and 265,732.80

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Solution

The fourth proportional to 611,926.80, 917,637.54 and 265,732.80 is: 398,489.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,926.80 : 917,637.54 = 265,732.80 : x
  2. Step 2: Convert to fraction form
    611,926.80/917,637.54 = 265,732.80/x
  3. Step 3: Cross multiply
    611,926.80x = 917,637.54 × 265,732.80
  4. Step 4: Simplify right side
    611,926.80x = 243,846,392,889.31
  5. Step 5: Solve for x
    x = 243,846,392,889.31/611,926.80
  6. Step 6: Final answer
    x = 398,489.48

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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.