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Finding the Fourth Proportional to 529,286.40, 791,985.60 and 389,318.40

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Solution

The fourth proportional to 529,286.40, 791,985.60 and 389,318.40 is: 582,547.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,286.40 : 791,985.60 = 389,318.40 : x
  2. Step 2: Convert to fraction form
    529,286.40/791,985.60 = 389,318.40/x
  3. Step 3: Cross multiply
    529,286.40x = 791,985.60 × 389,318.40
  4. Step 4: Simplify right side
    529,286.40x = 308,334,566,615.04
  5. Step 5: Solve for x
    x = 308,334,566,615.04/529,286.40
  6. Step 6: Final answer
    x = 582,547.68

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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.