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Finding the Fourth Proportional to 305,905.20, 458,857.80 and 260,634.30

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Solution

The fourth proportional to 305,905.20, 458,857.80 and 260,634.30 is: 390,951.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,905.20 : 458,857.80 = 260,634.30 : x
  2. Step 2: Convert to fraction form
    305,905.20/458,857.80 = 260,634.30/x
  3. Step 3: Cross multiply
    305,905.20x = 458,857.80 × 260,634.30
  4. Step 4: Simplify right side
    305,905.20x = 119,594,081,502.54
  5. Step 5: Solve for x
    x = 119,594,081,502.54/305,905.20
  6. Step 6: Final answer
    x = 390,951.45

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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.