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Finding the Fourth Proportional to 554,540.40, 831,807.90 and 217,342.80

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Solution

The fourth proportional to 554,540.40, 831,807.90 and 217,342.80 is: 326,013.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,540.40 : 831,807.90 = 217,342.80 : x
  2. Step 2: Convert to fraction form
    554,540.40/831,807.90 = 217,342.80/x
  3. Step 3: Cross multiply
    554,540.40x = 831,807.90 × 217,342.80
  4. Step 4: Simplify right side
    554,540.40x = 180,787,458,048.12
  5. Step 5: Solve for x
    x = 180,787,458,048.12/554,540.40
  6. Step 6: Final answer
    x = 326,013.14

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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.