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Finding the Fourth Proportional to 352,815.40, 529,223.10 and 212,847.40

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Solution

The fourth proportional to 352,815.40, 529,223.10 and 212,847.40 is: 319,271.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,815.40 : 529,223.10 = 212,847.40 : x
  2. Step 2: Convert to fraction form
    352,815.40/529,223.10 = 212,847.40/x
  3. Step 3: Cross multiply
    352,815.40x = 529,223.10 × 212,847.40
  4. Step 4: Simplify right side
    352,815.40x = 112,643,760,854.94
  5. Step 5: Solve for x
    x = 112,643,760,854.94/352,815.40
  6. Step 6: Final answer
    x = 319,271.10

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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.