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Finding the Fourth Proportional to 643,384.59, 965,080.53 and 170,064.95

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Solution

The fourth proportional to 643,384.59, 965,080.53 and 170,064.95 is: 255,098.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,384.59 : 965,080.53 = 170,064.95 : x
  2. Step 2: Convert to fraction form
    643,384.59/965,080.53 = 170,064.95/x
  3. Step 3: Cross multiply
    643,384.59x = 965,080.53 × 170,064.95
  4. Step 4: Simplify right side
    643,384.59x = 164,126,367,255.02
  5. Step 5: Solve for x
    x = 164,126,367,255.02/643,384.59
  6. Step 6: Final answer
    x = 255,098.38

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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.