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Finding the Fourth Proportional to 484,321.68, 668,456.42 and 320,689.53

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Solution

The fourth proportional to 484,321.68, 668,456.42 and 320,689.53 is: 442,612.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,321.68 : 668,456.42 = 320,689.53 : x
  2. Step 2: Convert to fraction form
    484,321.68/668,456.42 = 320,689.53/x
  3. Step 3: Cross multiply
    484,321.68x = 668,456.42 × 320,689.53
  4. Step 4: Simplify right side
    484,321.68x = 214,366,973,551.84
  5. Step 5: Solve for x
    x = 214,366,973,551.84/484,321.68
  6. Step 6: Final answer
    x = 442,612.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.