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Finding the Fourth Proportional to 386,563.52, 579,090.72 and 266,336.84

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Solution

The fourth proportional to 386,563.52, 579,090.72 and 266,336.84 is: 398,985.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,563.52 : 579,090.72 = 266,336.84 : x
  2. Step 2: Convert to fraction form
    386,563.52/579,090.72 = 266,336.84/x
  3. Step 3: Cross multiply
    386,563.52x = 579,090.72 × 266,336.84
  4. Step 4: Simplify right side
    386,563.52x = 154,233,192,438.13
  5. Step 5: Solve for x
    x = 154,233,192,438.13/386,563.52
  6. Step 6: Final answer
    x = 398,985.38

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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.