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Finding the Fourth Proportional to 528,819.80, 792,938.10 and 212,919.80

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Solution

The fourth proportional to 528,819.80, 792,938.10 and 212,919.80 is: 319,262.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,819.80 : 792,938.10 = 212,919.80 : x
  2. Step 2: Convert to fraction form
    528,819.80/792,938.10 = 212,919.80/x
  3. Step 3: Cross multiply
    528,819.80x = 792,938.10 × 212,919.80
  4. Step 4: Simplify right side
    528,819.80x = 168,832,221,664.38
  5. Step 5: Solve for x
    x = 168,832,221,664.38/528,819.80
  6. Step 6: Final answer
    x = 319,262.29

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1.5x scale

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.