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Finding the Fourth Proportional to 717,246.90, 989,807.58 and 394,968.42

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Solution

The fourth proportional to 717,246.90, 989,807.58 and 394,968.42 is: 545,060.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,246.90 : 989,807.58 = 394,968.42 : x
  2. Step 2: Convert to fraction form
    717,246.90/989,807.58 = 394,968.42/x
  3. Step 3: Cross multiply
    717,246.90x = 989,807.58 × 394,968.42
  4. Step 4: Simplify right side
    717,246.90x = 390,942,735,976.62
  5. Step 5: Solve for x
    x = 390,942,735,976.62/717,246.90
  6. Step 6: Final answer
    x = 545,060.20

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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.