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Finding the Fourth Proportional to 554,213.24, 764,745.78 and 309,140.48

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Solution

The fourth proportional to 554,213.24, 764,745.78 and 309,140.48 is: 426,575.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,213.24 : 764,745.78 = 309,140.48 : x
  2. Step 2: Convert to fraction form
    554,213.24/764,745.78 = 309,140.48/x
  3. Step 3: Cross multiply
    554,213.24x = 764,745.78 × 309,140.48
  4. Step 4: Simplify right side
    554,213.24x = 236,413,877,507.17
  5. Step 5: Solve for x
    x = 236,413,877,507.17/554,213.24
  6. Step 6: Final answer
    x = 426,575.66

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.