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Finding the Fourth Proportional to 389,479.88, 537,483.86 and 210,631.88

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Solution

The fourth proportional to 389,479.88, 537,483.86 and 210,631.88 is: 290,672.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,479.88 : 537,483.86 = 210,631.88 : x
  2. Step 2: Convert to fraction form
    389,479.88/537,483.86 = 210,631.88/x
  3. Step 3: Cross multiply
    389,479.88x = 537,483.86 × 210,631.88
  4. Step 4: Simplify right side
    389,479.88x = 113,211,232,160.88
  5. Step 5: Solve for x
    x = 113,211,232,160.88/389,479.88
  6. Step 6: Final answer
    x = 290,672.87

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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.