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Finding the Fourth Proportional to 210,008.70, 315,013.05 and 191,637.90

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Solution

The fourth proportional to 210,008.70, 315,013.05 and 191,637.90 is: 287,456.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,008.70 : 315,013.05 = 191,637.90 : x
  2. Step 2: Convert to fraction form
    210,008.70/315,013.05 = 191,637.90/x
  3. Step 3: Cross multiply
    210,008.70x = 315,013.05 × 191,637.90
  4. Step 4: Simplify right side
    210,008.70x = 60,368,439,374.60
  5. Step 5: Solve for x
    x = 60,368,439,374.60/210,008.70
  6. Step 6: Final answer
    x = 287,456.85

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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.