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Finding the Fourth Proportional to 607,415.76, 911,679.84 and 308,103.12

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Solution

The fourth proportional to 607,415.76, 911,679.84 and 308,103.12 is: 462,436.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,415.76 : 911,679.84 = 308,103.12 : x
  2. Step 2: Convert to fraction form
    607,415.76/911,679.84 = 308,103.12/x
  3. Step 3: Cross multiply
    607,415.76x = 911,679.84 × 308,103.12
  4. Step 4: Simplify right side
    607,415.76x = 280,891,403,145.10
  5. Step 5: Solve for x
    x = 280,891,403,145.10/607,415.76
  6. Step 6: Final answer
    x = 462,436.80

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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.