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Finding the Fourth Proportional to 508,809.20, 763,213.80 and 153,786.20

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Solution

The fourth proportional to 508,809.20, 763,213.80 and 153,786.20 is: 230,679.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,809.20 : 763,213.80 = 153,786.20 : x
  2. Step 2: Convert to fraction form
    508,809.20/763,213.80 = 153,786.20/x
  3. Step 3: Cross multiply
    508,809.20x = 763,213.80 × 153,786.20
  4. Step 4: Simplify right side
    508,809.20x = 117,371,750,089.56
  5. Step 5: Solve for x
    x = 117,371,750,089.56/508,809.20
  6. Step 6: Final answer
    x = 230,679.30

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Similar ratio
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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.