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Finding the Fourth Proportional to 638,260.32, 957,532.42 and 278,489.49

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Solution

The fourth proportional to 638,260.32, 957,532.42 and 278,489.49 is: 417,796.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,260.32 : 957,532.42 = 278,489.49 : x
  2. Step 2: Convert to fraction form
    638,260.32/957,532.42 = 278,489.49/x
  3. Step 3: Cross multiply
    638,260.32x = 957,532.42 × 278,489.49
  4. Step 4: Simplify right side
    638,260.32x = 266,662,712,061.63
  5. Step 5: Solve for x
    x = 266,662,712,061.63/638,260.32
  6. Step 6: Final answer
    x = 417,796.16

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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.