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Finding the Fourth Proportional to 529,214.40, 791,877.60 and 389,246.40

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Solution

The fourth proportional to 529,214.40, 791,877.60 and 389,246.40 is: 582,439.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,214.40 : 791,877.60 = 389,246.40 : x
  2. Step 2: Convert to fraction form
    529,214.40/791,877.60 = 389,246.40/x
  3. Step 3: Cross multiply
    529,214.40x = 791,877.60 × 389,246.40
  4. Step 4: Simplify right side
    529,214.40x = 308,235,505,040.64
  5. Step 5: Solve for x
    x = 308,235,505,040.64/529,214.40
  6. Step 6: Final answer
    x = 582,439.75

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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.