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Finding the Fourth Proportional to 613,422.84, 918,909 and 487,276.68

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Solution

The fourth proportional to 613,422.84, 918,909 and 487,276.68 is: 729,941.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,422.84 : 918,909 = 487,276.68 : x
  2. Step 2: Convert to fraction form
    613,422.84/918,909 = 487,276.68/x
  3. Step 3: Cross multiply
    613,422.84x = 918,909 × 487,276.68
  4. Step 4: Simplify right side
    613,422.84x = 447,762,926,742.12
  5. Step 5: Solve for x
    x = 447,762,926,742.12/613,422.84
  6. Step 6: Final answer
    x = 729,941.73

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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.