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Finding the Fourth Proportional to 324,663.60, 486,995.40 and 212,689.20

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Solution

The fourth proportional to 324,663.60, 486,995.40 and 212,689.20 is: 319,033.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,663.60 : 486,995.40 = 212,689.20 : x
  2. Step 2: Convert to fraction form
    324,663.60/486,995.40 = 212,689.20/x
  3. Step 3: Cross multiply
    324,663.60x = 486,995.40 × 212,689.20
  4. Step 4: Simplify right side
    324,663.60x = 103,578,662,029.68
  5. Step 5: Solve for x
    x = 103,578,662,029.68/324,663.60
  6. Step 6: Final answer
    x = 319,033.80

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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.