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Finding the Fourth Proportional to 550,344.60, 825,516.90 and 390,912.30

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Solution

The fourth proportional to 550,344.60, 825,516.90 and 390,912.30 is: 586,368.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    550,344.60 : 825,516.90 = 390,912.30 : x
  2. Step 2: Convert to fraction form
    550,344.60/825,516.90 = 390,912.30/x
  3. Step 3: Cross multiply
    550,344.60x = 825,516.90 × 390,912.30
  4. Step 4: Simplify right side
    550,344.60x = 322,704,710,067.87
  5. Step 5: Solve for x
    x = 322,704,710,067.87/550,344.60
  6. Step 6: Final answer
    x = 586,368.45

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Similar ratio
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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.