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Finding the Fourth Proportional to 553,210.84, 763,600.20 and 323,821.78

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Solution

The fourth proportional to 553,210.84, 763,600.20 and 323,821.78 is: 446,973.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,210.84 : 763,600.20 = 323,821.78 : x
  2. Step 2: Convert to fraction form
    553,210.84/763,600.20 = 323,821.78/x
  3. Step 3: Cross multiply
    553,210.84x = 763,600.20 × 323,821.78
  4. Step 4: Simplify right side
    553,210.84x = 247,270,375,972.36
  5. Step 5: Solve for x
    x = 247,270,375,972.36/553,210.84
  6. Step 6: Final answer
    x = 446,973.12

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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.