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Finding the Fourth Proportional to 352,972.80, 529,459.20 and 212,659.20

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Solution

The fourth proportional to 352,972.80, 529,459.20 and 212,659.20 is: 318,988.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,972.80 : 529,459.20 = 212,659.20 : x
  2. Step 2: Convert to fraction form
    352,972.80/529,459.20 = 212,659.20/x
  3. Step 3: Cross multiply
    352,972.80x = 529,459.20 × 212,659.20
  4. Step 4: Simplify right side
    352,972.80x = 112,594,369,904.64
  5. Step 5: Solve for x
    x = 112,594,369,904.64/352,972.80
  6. Step 6: Final answer
    x = 318,988.80

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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.