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Finding the Fourth Proportional to 617,939.20, 926,908.80 and 448,665.40

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Solution

The fourth proportional to 617,939.20, 926,908.80 and 448,665.40 is: 672,998.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    617,939.20 : 926,908.80 = 448,665.40 : x
  2. Step 2: Convert to fraction form
    617,939.20/926,908.80 = 448,665.40/x
  3. Step 3: Cross multiply
    617,939.20x = 926,908.80 × 448,665.40
  4. Step 4: Simplify right side
    617,939.20x = 415,871,907,515.52
  5. Step 5: Solve for x
    x = 415,871,907,515.52/617,939.20
  6. Step 6: Final answer
    x = 672,998.10

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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.