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Finding the Fourth Proportional to 553,089.29, 763,277.45 and 311,380.45

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Solution

The fourth proportional to 553,089.29, 763,277.45 and 311,380.45 is: 429,713.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,089.29 : 763,277.45 = 311,380.45 : x
  2. Step 2: Convert to fraction form
    553,089.29/763,277.45 = 311,380.45/x
  3. Step 3: Cross multiply
    553,089.29x = 763,277.45 × 311,380.45
  4. Step 4: Simplify right side
    553,089.29x = 237,669,675,855.85
  5. Step 5: Solve for x
    x = 237,669,675,855.85/553,089.29
  6. Step 6: Final answer
    x = 429,713.03

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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.