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Finding the Fourth Proportional to 389,809.88, 537,937.64 and 210,961.88

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Solution

The fourth proportional to 389,809.88, 537,937.64 and 210,961.88 is: 291,127.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,809.88 : 537,937.64 = 210,961.88 : x
  2. Step 2: Convert to fraction form
    389,809.88/537,937.64 = 210,961.88/x
  3. Step 3: Cross multiply
    389,809.88x = 537,937.64 × 210,961.88
  4. Step 4: Simplify right side
    389,809.88x = 113,484,332,112.67
  5. Step 5: Solve for x
    x = 113,484,332,112.67/389,809.88
  6. Step 6: Final answer
    x = 291,127.39

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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.