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Finding the Fourth Proportional to 485,357.94, 728,036.91 and 148,398.60

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Solution

The fourth proportional to 485,357.94, 728,036.91 and 148,398.60 is: 222,597.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,357.94 : 728,036.91 = 148,398.60 : x
  2. Step 2: Convert to fraction form
    485,357.94/728,036.91 = 148,398.60/x
  3. Step 3: Cross multiply
    485,357.94x = 728,036.91 × 148,398.60
  4. Step 4: Simplify right side
    485,357.94x = 108,039,658,748.82
  5. Step 5: Solve for x
    x = 108,039,658,748.82/485,357.94
  6. Step 6: Final answer
    x = 222,597.90

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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.