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Finding the Fourth Proportional to 210,920.61, 291,206.28 and 188,220.56

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Solution

The fourth proportional to 210,920.61, 291,206.28 and 188,220.56 is: 259,865.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,920.61 : 291,206.28 = 188,220.56 : x
  2. Step 2: Convert to fraction form
    210,920.61/291,206.28 = 188,220.56/x
  3. Step 3: Cross multiply
    210,920.61x = 291,206.28 × 188,220.56
  4. Step 4: Simplify right side
    210,920.61x = 54,811,008,369.10
  5. Step 5: Solve for x
    x = 54,811,008,369.10/210,920.61
  6. Step 6: Final answer
    x = 259,865.59

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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.