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Finding the Fourth Proportional to 643,725.48, 965,620.98 and 217,276.86

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Solution

The fourth proportional to 643,725.48, 965,620.98 and 217,276.86 is: 325,926.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,725.48 : 965,620.98 = 217,276.86 : x
  2. Step 2: Convert to fraction form
    643,725.48/965,620.98 = 217,276.86/x
  3. Step 3: Cross multiply
    643,725.48x = 965,620.98 × 217,276.86
  4. Step 4: Simplify right side
    643,725.48x = 209,807,094,484.52
  5. Step 5: Solve for x
    x = 209,807,094,484.52/643,725.48
  6. Step 6: Final answer
    x = 325,926.35

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1.5x scale

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.