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Finding the Fourth Proportional to 266,421.60, 399,859.20 and 108,763.20

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Solution

The fourth proportional to 266,421.60, 399,859.20 and 108,763.20 is: 163,237.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,421.60 : 399,859.20 = 108,763.20 : x
  2. Step 2: Convert to fraction form
    266,421.60/399,859.20 = 108,763.20/x
  3. Step 3: Cross multiply
    266,421.60x = 399,859.20 × 108,763.20
  4. Step 4: Simplify right side
    266,421.60x = 43,489,966,141.44
  5. Step 5: Solve for x
    x = 43,489,966,141.44/266,421.60
  6. Step 6: Final answer
    x = 163,237.39

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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.