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Finding the Fourth Proportional to 485,471.49, 728,090.31 and 148,515.06

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Solution

The fourth proportional to 485,471.49, 728,090.31 and 148,515.06 is: 222,736.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,471.49 : 728,090.31 = 148,515.06 : x
  2. Step 2: Convert to fraction form
    485,471.49/728,090.31 = 148,515.06/x
  3. Step 3: Cross multiply
    485,471.49x = 728,090.31 × 148,515.06
  4. Step 4: Simplify right side
    485,471.49x = 108,132,376,075.07
  5. Step 5: Solve for x
    x = 108,132,376,075.07/485,471.49
  6. Step 6: Final answer
    x = 222,736.82

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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.