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Finding the Fourth Proportional to 553,311.93, 763,603.01 and 338,493.18

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Solution

The fourth proportional to 553,311.93, 763,603.01 and 338,493.18 is: 467,140.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,311.93 : 763,603.01 = 338,493.18 : x
  2. Step 2: Convert to fraction form
    553,311.93/763,603.01 = 338,493.18/x
  3. Step 3: Cross multiply
    553,311.93x = 763,603.01 × 338,493.18
  4. Step 4: Simplify right side
    553,311.93x = 258,474,408,140.69
  5. Step 5: Solve for x
    x = 258,474,408,140.69/553,311.93
  6. Step 6: Final answer
    x = 467,140.49

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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.