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Finding the Fourth Proportional to 215,398.50, 297,498.87 and 143,654.10

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Solution

The fourth proportional to 215,398.50, 297,498.87 and 143,654.10 is: 198,408.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,398.50 : 297,498.87 = 143,654.10 : x
  2. Step 2: Convert to fraction form
    215,398.50/297,498.87 = 143,654.10/x
  3. Step 3: Cross multiply
    215,398.50x = 297,498.87 × 143,654.10
  4. Step 4: Simplify right side
    215,398.50x = 42,736,932,420.87
  5. Step 5: Solve for x
    x = 42,736,932,420.87/215,398.50
  6. Step 6: Final answer
    x = 198,408.68

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1.5x scale

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.