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Finding the Fourth Proportional to 319,980.39, 479,998.14 and 83,323.50

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Solution

The fourth proportional to 319,980.39, 479,998.14 and 83,323.50 is: 124,992.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,980.39 : 479,998.14 = 83,323.50 : x
  2. Step 2: Convert to fraction form
    319,980.39/479,998.14 = 83,323.50/x
  3. Step 3: Cross multiply
    319,980.39x = 479,998.14 × 83,323.50
  4. Step 4: Simplify right side
    319,980.39x = 39,995,125,018.29
  5. Step 5: Solve for x
    x = 39,995,125,018.29/319,980.39
  6. Step 6: Final answer
    x = 124,992.43

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1.5x scale

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.