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Finding the Fourth Proportional to 901,648, 1,244,313.18 and 499,240

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Solution

The fourth proportional to 901,648, 1,244,313.18 and 499,240 is: 688,972.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    901,648 : 1,244,313.18 = 499,240 : x
  2. Step 2: Convert to fraction form
    901,648/1,244,313.18 = 499,240/x
  3. Step 3: Cross multiply
    901,648x = 1,244,313.18 × 499,240
  4. Step 4: Simplify right side
    901,648x = 621,210,911,983.20
  5. Step 5: Solve for x
    x = 621,210,911,983.20/901,648
  6. Step 6: Final answer
    x = 688,972.76

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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.