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Finding the Fourth Proportional to 389,768.76, 537,882.66 and 210,920.76

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Solution

The fourth proportional to 389,768.76, 537,882.66 and 210,920.76 is: 291,071.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,768.76 : 537,882.66 = 210,920.76 : x
  2. Step 2: Convert to fraction form
    389,768.76/537,882.66 = 210,920.76/x
  3. Step 3: Cross multiply
    389,768.76x = 537,882.66 × 210,920.76
  4. Step 4: Simplify right side
    389,768.76x = 113,450,619,438.02
  5. Step 5: Solve for x
    x = 113,450,619,438.02/389,768.76
  6. Step 6: Final answer
    x = 291,071.61

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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.