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Finding the Fourth Proportional to 554,609.90, 831,912.15 and 217,412.30

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Solution

The fourth proportional to 554,609.90, 831,912.15 and 217,412.30 is: 326,117.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,609.90 : 831,912.15 = 217,412.30 : x
  2. Step 2: Convert to fraction form
    554,609.90/831,912.15 = 217,412.30/x
  3. Step 3: Cross multiply
    554,609.90x = 831,912.15 × 217,412.30
  4. Step 4: Simplify right side
    554,609.90x = 180,867,933,929.45
  5. Step 5: Solve for x
    x = 180,867,933,929.45/554,609.90
  6. Step 6: Final answer
    x = 326,117.39

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1.5x scale

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.