Home / 639,890.92-959,953.02-320,209.96

Finding the Fourth Proportional to 639,890.92, 959,953.02 and 320,209.96

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Solution

The fourth proportional to 639,890.92, 959,953.02 and 320,209.96 is: 480,373.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,890.92 : 959,953.02 = 320,209.96 : x
  2. Step 2: Convert to fraction form
    639,890.92/959,953.02 = 320,209.96/x
  3. Step 3: Cross multiply
    639,890.92x = 959,953.02 × 320,209.96
  4. Step 4: Simplify right side
    639,890.92x = 307,386,518,136.08
  5. Step 5: Solve for x
    x = 307,386,518,136.08/639,890.92
  6. Step 6: Final answer
    x = 480,373.31

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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.