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Finding the Fourth Proportional to 1,009,727.12, 1,393,401 and 557,018

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Solution

The fourth proportional to 1,009,727.12, 1,393,401 and 557,018 is: 768,672.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,009,727.12 : 1,393,401 = 557,018 : x
  2. Step 2: Convert to fraction form
    1,009,727.12/1,393,401 = 557,018/x
  3. Step 3: Cross multiply
    1,009,727.12x = 1,393,401 × 557,018
  4. Step 4: Simplify right side
    1,009,727.12x = 776,149,438,218
  5. Step 5: Solve for x
    x = 776,149,438,218/1,009,727.12
  6. Step 6: Final answer
    x = 768,672.47

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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.