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Finding the Fourth Proportional to 607,410.90, 911,116.35 and 408,345.30

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Solution

The fourth proportional to 607,410.90, 911,116.35 and 408,345.30 is: 612,517.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,410.90 : 911,116.35 = 408,345.30 : x
  2. Step 2: Convert to fraction form
    607,410.90/911,116.35 = 408,345.30/x
  3. Step 3: Cross multiply
    607,410.90x = 911,116.35 × 408,345.30
  4. Step 4: Simplify right side
    607,410.90x = 372,050,079,275.66
  5. Step 5: Solve for x
    x = 372,050,079,275.66/607,410.90
  6. Step 6: Final answer
    x = 612,517.95

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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.