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Finding the Fourth Proportional to 395,642.75, 545,685.74 and 340,545.85

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Solution

The fourth proportional to 395,642.75, 545,685.74 and 340,545.85 is: 469,693.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,642.75 : 545,685.74 = 340,545.85 : x
  2. Step 2: Convert to fraction form
    395,642.75/545,685.74 = 340,545.85/x
  3. Step 3: Cross multiply
    395,642.75x = 545,685.74 × 340,545.85
  4. Step 4: Simplify right side
    395,642.75x = 185,831,014,829.34
  5. Step 5: Solve for x
    x = 185,831,014,829.34/395,642.75
  6. Step 6: Final answer
    x = 469,693.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.