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Finding the Fourth Proportional to 490,085.80, 735,128.70 and 322,124.20

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Solution

The fourth proportional to 490,085.80, 735,128.70 and 322,124.20 is: 483,186.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,085.80 : 735,128.70 = 322,124.20 : x
  2. Step 2: Convert to fraction form
    490,085.80/735,128.70 = 322,124.20/x
  3. Step 3: Cross multiply
    490,085.80x = 735,128.70 × 322,124.20
  4. Step 4: Simplify right side
    490,085.80x = 236,802,744,384.54
  5. Step 5: Solve for x
    x = 236,802,744,384.54/490,085.80
  6. Step 6: Final answer
    x = 483,186.30

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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.