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Finding the Fourth Proportional to 553,588.48, 763,155.84 and 394,336

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Solution

The fourth proportional to 553,588.48, 763,155.84 and 394,336 is: 543,616.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,588.48 : 763,155.84 = 394,336 : x
  2. Step 2: Convert to fraction form
    553,588.48/763,155.84 = 394,336/x
  3. Step 3: Cross multiply
    553,588.48x = 763,155.84 × 394,336
  4. Step 4: Simplify right side
    553,588.48x = 300,939,821,322.24
  5. Step 5: Solve for x
    x = 300,939,821,322.24/553,588.48
  6. Step 6: Final answer
    x = 543,616.48

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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.