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Finding the Fourth Proportional to 660,724.68, 991,426 and 323,759

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Solution

The fourth proportional to 660,724.68, 991,426 and 323,759 is: 485,804.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,724.68 : 991,426 = 323,759 : x
  2. Step 2: Convert to fraction form
    660,724.68/991,426 = 323,759/x
  3. Step 3: Cross multiply
    660,724.68x = 991,426 × 323,759
  4. Step 4: Simplify right side
    660,724.68x = 320,983,090,334
  5. Step 5: Solve for x
    x = 320,983,090,334/660,724.68
  6. Step 6: Final answer
    x = 485,804.60

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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.