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Finding the Fourth Proportional to 553,355.16, 763,658.55 and 338,427.78

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Solution

The fourth proportional to 553,355.16, 763,658.55 and 338,427.78 is: 467,047.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,355.16 : 763,658.55 = 338,427.78 : x
  2. Step 2: Convert to fraction form
    553,355.16/763,658.55 = 338,427.78/x
  3. Step 3: Cross multiply
    553,355.16x = 763,658.55 × 338,427.78
  4. Step 4: Simplify right side
    553,355.16x = 258,443,267,754.52
  5. Step 5: Solve for x
    x = 258,443,267,754.52/553,355.16
  6. Step 6: Final answer
    x = 467,047.72

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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.