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Finding the Fourth Proportional to 660,872.70, 989,164.31 and 356,844.20

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Solution

The fourth proportional to 660,872.70, 989,164.31 and 356,844.20 is: 534,108.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,872.70 : 989,164.31 = 356,844.20 : x
  2. Step 2: Convert to fraction form
    660,872.70/989,164.31 = 356,844.20/x
  3. Step 3: Cross multiply
    660,872.70x = 989,164.31 × 356,844.20
  4. Step 4: Simplify right side
    660,872.70x = 352,977,540,140.46
  5. Step 5: Solve for x
    x = 352,977,540,140.46/660,872.70
  6. Step 6: Final answer
    x = 534,108.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.