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Finding the Fourth Proportional to 918,018, 1,266,983.64 and 515,610

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Solution

The fourth proportional to 918,018, 1,266,983.64 and 515,610 is: 711,608.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,018 : 1,266,983.64 = 515,610 : x
  2. Step 2: Convert to fraction form
    918,018/1,266,983.64 = 515,610/x
  3. Step 3: Cross multiply
    918,018x = 1,266,983.64 × 515,610
  4. Step 4: Simplify right side
    918,018x = 653,269,434,620.40
  5. Step 5: Solve for x
    x = 653,269,434,620.40/918,018
  6. Step 6: Final answer
    x = 711,608.52

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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.