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Finding the Fourth Proportional to 423,435.72, 635,154.47 and 297,638.88

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Solution

The fourth proportional to 423,435.72, 635,154.47 and 297,638.88 is: 446,458.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,435.72 : 635,154.47 = 297,638.88 : x
  2. Step 2: Convert to fraction form
    423,435.72/635,154.47 = 297,638.88/x
  3. Step 3: Cross multiply
    423,435.72x = 635,154.47 × 297,638.88
  4. Step 4: Simplify right side
    423,435.72x = 189,046,665,077.79
  5. Step 5: Solve for x
    x = 189,046,665,077.79/423,435.72
  6. Step 6: Final answer
    x = 446,458.95

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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.