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Finding the Fourth Proportional to 390,040.05, 585,060.08 and 363,796.05

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Solution

The fourth proportional to 390,040.05, 585,060.08 and 363,796.05 is: 545,694.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,040.05 : 585,060.08 = 363,796.05 : x
  2. Step 2: Convert to fraction form
    390,040.05/585,060.08 = 363,796.05/x
  3. Step 3: Cross multiply
    390,040.05x = 585,060.08 × 363,796.05
  4. Step 4: Simplify right side
    390,040.05x = 212,842,544,297.70
  5. Step 5: Solve for x
    x = 212,842,544,297.70/390,040.05
  6. Step 6: Final answer
    x = 545,694.08

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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.