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Finding the Fourth Proportional to 386,455.40, 541,406.20 and 386,455.40

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Solution

The fourth proportional to 386,455.40, 541,406.20 and 386,455.40 is: 541,406.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,455.40 : 541,406.20 = 386,455.40 : x
  2. Step 2: Convert to fraction form
    386,455.40/541,406.20 = 386,455.40/x
  3. Step 3: Cross multiply
    386,455.40x = 541,406.20 × 386,455.40
  4. Step 4: Simplify right side
    386,455.40x = 209,229,349,583.48
  5. Step 5: Solve for x
    x = 209,229,349,583.48/386,455.40
  6. Step 6: Final answer
    x = 541,406.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.