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Finding the Fourth Proportional to 210,018.20, 315,027.30 and 191,647.40

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Solution

The fourth proportional to 210,018.20, 315,027.30 and 191,647.40 is: 287,471.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,018.20 : 315,027.30 = 191,647.40 : x
  2. Step 2: Convert to fraction form
    210,018.20/315,027.30 = 191,647.40/x
  3. Step 3: Cross multiply
    210,018.20x = 315,027.30 × 191,647.40
  4. Step 4: Simplify right side
    210,018.20x = 60,374,162,974.02
  5. Step 5: Solve for x
    x = 60,374,162,974.02/210,018.20
  6. Step 6: Final answer
    x = 287,471.10

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1.5x scale

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.