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Finding the Fourth Proportional to 418,004.31, 626,995.53 and 148,128.51

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Solution

The fourth proportional to 418,004.31, 626,995.53 and 148,128.51 is: 222,188.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,004.31 : 626,995.53 = 148,128.51 : x
  2. Step 2: Convert to fraction form
    418,004.31/626,995.53 = 148,128.51/x
  3. Step 3: Cross multiply
    418,004.31x = 626,995.53 × 148,128.51
  4. Step 4: Simplify right side
    418,004.31x = 92,875,913,635.56
  5. Step 5: Solve for x
    x = 92,875,913,635.56/418,004.31
  6. Step 6: Final answer
    x = 222,188.89

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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.