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Finding the Fourth Proportional to 423,455.85, 635,281.16 and 123,929.37

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Solution

The fourth proportional to 423,455.85, 635,281.16 and 123,929.37 is: 185,922.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,455.85 : 635,281.16 = 123,929.37 : x
  2. Step 2: Convert to fraction form
    423,455.85/635,281.16 = 123,929.37/x
  3. Step 3: Cross multiply
    423,455.85x = 635,281.16 × 123,929.37
  4. Step 4: Simplify right side
    423,455.85x = 78,729,993,312.02
  5. Step 5: Solve for x
    x = 78,729,993,312.02/423,455.85
  6. Step 6: Final answer
    x = 185,922.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.