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Finding the Fourth Proportional to 553,221.35, 763,366.03 and 308,204.45

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Solution

The fourth proportional to 553,221.35, 763,366.03 and 308,204.45 is: 425,277.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,221.35 : 763,366.03 = 308,204.45 : x
  2. Step 2: Convert to fraction form
    553,221.35/763,366.03 = 308,204.45/x
  3. Step 3: Cross multiply
    553,221.35x = 763,366.03 × 308,204.45
  4. Step 4: Simplify right side
    553,221.35x = 235,272,807,424.83
  5. Step 5: Solve for x
    x = 235,272,807,424.83/553,221.35
  6. Step 6: Final answer
    x = 425,277.89

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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.