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Finding the Fourth Proportional to 385,921.99, 577,886.01 and 266,347.90

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Solution

The fourth proportional to 385,921.99, 577,886.01 and 266,347.90 is: 398,833.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,921.99 : 577,886.01 = 266,347.90 : x
  2. Step 2: Convert to fraction form
    385,921.99/577,886.01 = 266,347.90/x
  3. Step 3: Cross multiply
    385,921.99x = 577,886.01 × 266,347.90
  4. Step 4: Simplify right side
    385,921.99x = 153,918,725,202.88
  5. Step 5: Solve for x
    x = 153,918,725,202.88/385,921.99
  6. Step 6: Final answer
    x = 398,833.78

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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.