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Finding the Fourth Proportional to 528,193.80, 792,290.70 and 329,128.20

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Solution

The fourth proportional to 528,193.80, 792,290.70 and 329,128.20 is: 493,692.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,193.80 : 792,290.70 = 329,128.20 : x
  2. Step 2: Convert to fraction form
    528,193.80/792,290.70 = 329,128.20/x
  3. Step 3: Cross multiply
    528,193.80x = 792,290.70 × 329,128.20
  4. Step 4: Simplify right side
    528,193.80x = 260,765,211,967.74
  5. Step 5: Solve for x
    x = 260,765,211,967.74/528,193.80
  6. Step 6: Final answer
    x = 493,692.30

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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.