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Finding the Fourth Proportional to 528,090.80, 792,136.20 and 212,385.20

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Solution

The fourth proportional to 528,090.80, 792,136.20 and 212,385.20 is: 318,577.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,090.80 : 792,136.20 = 212,385.20 : x
  2. Step 2: Convert to fraction form
    528,090.80/792,136.20 = 212,385.20/x
  3. Step 3: Cross multiply
    528,090.80x = 792,136.20 × 212,385.20
  4. Step 4: Simplify right side
    528,090.80x = 168,238,005,264.24
  5. Step 5: Solve for x
    x = 168,238,005,264.24/528,090.80
  6. Step 6: Final answer
    x = 318,577.80

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Similar ratio
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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.