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Finding the Fourth Proportional to 901,980, 1,244,772 and 499,572

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Solution

The fourth proportional to 901,980, 1,244,772 and 499,572 is: 689,431.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    901,980 : 1,244,772 = 499,572 : x
  2. Step 2: Convert to fraction form
    901,980/1,244,772 = 499,572/x
  3. Step 3: Cross multiply
    901,980x = 1,244,772 × 499,572
  4. Step 4: Simplify right side
    901,980x = 621,853,237,584
  5. Step 5: Solve for x
    x = 621,853,237,584/901,980
  6. Step 6: Final answer
    x = 689,431.29

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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.