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Finding the Fourth Proportional to 485,458.65, 728,071.29 and 248,679.45

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Solution

The fourth proportional to 485,458.65, 728,071.29 and 248,679.45 is: 372,959.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,458.65 : 728,071.29 = 248,679.45 : x
  2. Step 2: Convert to fraction form
    485,458.65/728,071.29 = 248,679.45/x
  3. Step 3: Cross multiply
    485,458.65x = 728,071.29 × 248,679.45
  4. Step 4: Simplify right side
    485,458.65x = 181,056,367,957.99
  5. Step 5: Solve for x
    x = 181,056,367,957.99/485,458.65
  6. Step 6: Final answer
    x = 372,959.40

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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.