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Finding the Fourth Proportional to 528,480.90, 792,138.15 and 291,993.30

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Solution

The fourth proportional to 528,480.90, 792,138.15 and 291,993.30 is: 437,667.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,480.90 : 792,138.15 = 291,993.30 : x
  2. Step 2: Convert to fraction form
    528,480.90/792,138.15 = 291,993.30/x
  3. Step 3: Cross multiply
    528,480.90x = 792,138.15 × 291,993.30
  4. Step 4: Simplify right side
    528,480.90x = 231,299,032,474.40
  5. Step 5: Solve for x
    x = 231,299,032,474.40/528,480.90
  6. Step 6: Final answer
    x = 437,667.72

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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.