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Finding the Fourth Proportional to 403,770.30, 605,655.45 and 340,784.70

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Solution

The fourth proportional to 403,770.30, 605,655.45 and 340,784.70 is: 511,177.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,770.30 : 605,655.45 = 340,784.70 : x
  2. Step 2: Convert to fraction form
    403,770.30/605,655.45 = 340,784.70/x
  3. Step 3: Cross multiply
    403,770.30x = 605,655.45 × 340,784.70
  4. Step 4: Simplify right side
    403,770.30x = 206,398,110,831.62
  5. Step 5: Solve for x
    x = 206,398,110,831.62/403,770.30
  6. Step 6: Final answer
    x = 511,177.05

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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.