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Finding the Fourth Proportional to 305,420.10, 458,308.80 and 127,912.20

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Solution

The fourth proportional to 305,420.10, 458,308.80 and 127,912.20 is: 191,943.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,420.10 : 458,308.80 = 127,912.20 : x
  2. Step 2: Convert to fraction form
    305,420.10/458,308.80 = 127,912.20/x
  3. Step 3: Cross multiply
    305,420.10x = 458,308.80 × 127,912.20
  4. Step 4: Simplify right side
    305,420.10x = 58,623,286,887.36
  5. Step 5: Solve for x
    x = 58,623,286,887.36/305,420.10
  6. Step 6: Final answer
    x = 191,943.12

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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.