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Finding the Fourth Proportional to 1,008,385, 1,391,601 and 555,705.16

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Solution

The fourth proportional to 1,008,385, 1,391,601 and 555,705.16 is: 766,889.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008,385 : 1,391,601 = 555,705.16 : x
  2. Step 2: Convert to fraction form
    1,008,385/1,391,601 = 555,705.16/x
  3. Step 3: Cross multiply
    1,008,385x = 1,391,601 × 555,705.16
  4. Step 4: Simplify right side
    1,008,385x = 773,319,856,361.16
  5. Step 5: Solve for x
    x = 773,319,856,361.16/1,008,385
  6. Step 6: Final answer
    x = 766,889.49

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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.