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Finding the Fourth Proportional to 354,952.12, 490,352.10 and 307,122.43

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Solution

The fourth proportional to 354,952.12, 490,352.10 and 307,122.43 is: 424,277.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,952.12 : 490,352.10 = 307,122.43 : x
  2. Step 2: Convert to fraction form
    354,952.12/490,352.10 = 307,122.43/x
  3. Step 3: Cross multiply
    354,952.12x = 490,352.10 × 307,122.43
  4. Step 4: Simplify right side
    354,952.12x = 150,598,126,055.84
  5. Step 5: Solve for x
    x = 150,598,126,055.84/354,952.12
  6. Step 6: Final answer
    x = 424,277.30

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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.