Home / 1,147,398.40-1,583,411.39-638,100.78

Finding the Fourth Proportional to 1,147,398.40, 1,583,411.39 and 638,100.78

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Solution

The fourth proportional to 1,147,398.40, 1,583,411.39 and 638,100.78 is: 880,579.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147,398.40 : 1,583,411.39 = 638,100.78 : x
  2. Step 2: Convert to fraction form
    1,147,398.40/1,583,411.39 = 638,100.78/x
  3. Step 3: Cross multiply
    1,147,398.40x = 1,583,411.39 × 638,100.78
  4. Step 4: Simplify right side
    1,147,398.40x = 1,010,376,031,912.32
  5. Step 5: Solve for x
    x = 1,010,376,031,912.32/1,147,398.40
  6. Step 6: Final answer
    x = 880,579.96

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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.