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Finding the Fourth Proportional to 354,498.40, 532,136.40 and 221,528.80

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Solution

The fourth proportional to 354,498.40, 532,136.40 and 221,528.80 is: 332,536.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,498.40 : 532,136.40 = 221,528.80 : x
  2. Step 2: Convert to fraction form
    354,498.40/532,136.40 = 221,528.80/x
  3. Step 3: Cross multiply
    354,498.40x = 532,136.40 × 221,528.80
  4. Step 4: Simplify right side
    354,498.40x = 117,883,538,128.32
  5. Step 5: Solve for x
    x = 117,883,538,128.32/354,498.40
  6. Step 6: Final answer
    x = 332,536.16

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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.