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Finding the Fourth Proportional to 643,756.48, 965,634.69 and 343,326.88

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Solution

The fourth proportional to 643,756.48, 965,634.69 and 343,326.88 is: 514,990.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,756.48 : 965,634.69 = 343,326.88 : x
  2. Step 2: Convert to fraction form
    643,756.48/965,634.69 = 343,326.88/x
  3. Step 3: Cross multiply
    643,756.48x = 965,634.69 × 343,326.88
  4. Step 4: Simplify right side
    643,756.48x = 331,528,345,337.47
  5. Step 5: Solve for x
    x = 331,528,345,337.47/643,756.48
  6. Step 6: Final answer
    x = 514,990.30

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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.