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Finding the Fourth Proportional to 486,812.80, 730,219.20 and 276,860.80

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Solution

The fourth proportional to 486,812.80, 730,219.20 and 276,860.80 is: 415,291.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,812.80 : 730,219.20 = 276,860.80 : x
  2. Step 2: Convert to fraction form
    486,812.80/730,219.20 = 276,860.80/x
  3. Step 3: Cross multiply
    486,812.80x = 730,219.20 × 276,860.80
  4. Step 4: Simplify right side
    486,812.80x = 202,169,071,887.36
  5. Step 5: Solve for x
    x = 202,169,071,887.36/486,812.80
  6. Step 6: Final answer
    x = 415,291.20

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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.