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Finding the Fourth Proportional to 485,688.23, 728,620.01 and 219,574.07

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Solution

The fourth proportional to 485,688.23, 728,620.01 and 219,574.07 is: 329,400.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,688.23 : 728,620.01 = 219,574.07 : x
  2. Step 2: Convert to fraction form
    485,688.23/728,620.01 = 219,574.07/x
  3. Step 3: Cross multiply
    485,688.23x = 728,620.01 × 219,574.07
  4. Step 4: Simplify right side
    485,688.23x = 159,986,059,981.27
  5. Step 5: Solve for x
    x = 159,986,059,981.27/485,688.23
  6. Step 6: Final answer
    x = 329,400.74

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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.