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Finding the Fourth Proportional to 528,076.70, 792,503.85 and 212,759.90

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Solution

The fourth proportional to 528,076.70, 792,503.85 and 212,759.90 is: 319,296.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,076.70 : 792,503.85 = 212,759.90 : x
  2. Step 2: Convert to fraction form
    528,076.70/792,503.85 = 212,759.90/x
  3. Step 3: Cross multiply
    528,076.70x = 792,503.85 × 212,759.90
  4. Step 4: Simplify right side
    528,076.70x = 168,613,039,875.62
  5. Step 5: Solve for x
    x = 168,613,039,875.62/528,076.70
  6. Step 6: Final answer
    x = 319,296.50

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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.