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Finding the Fourth Proportional to 898,376.78, 1,239,741 and 490,458.90

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Solution

The fourth proportional to 898,376.78, 1,239,741 and 490,458.90 is: 676,822.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    898,376.78 : 1,239,741 = 490,458.90 : x
  2. Step 2: Convert to fraction form
    898,376.78/1,239,741 = 490,458.90/x
  3. Step 3: Cross multiply
    898,376.78x = 1,239,741 × 490,458.90
  4. Step 4: Simplify right side
    898,376.78x = 608,042,007,144.90
  5. Step 5: Solve for x
    x = 608,042,007,144.90/898,376.78
  6. Step 6: Final answer
    x = 676,822.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.