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Finding the Fourth Proportional to 551,268.72, 825,697.49 and 390,858.42

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Solution

The fourth proportional to 551,268.72, 825,697.49 and 390,858.42 is: 585,432.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,268.72 : 825,697.49 = 390,858.42 : x
  2. Step 2: Convert to fraction form
    551,268.72/825,697.49 = 390,858.42/x
  3. Step 3: Cross multiply
    551,268.72x = 825,697.49 × 390,858.42
  4. Step 4: Simplify right side
    551,268.72x = 322,730,818,947.16
  5. Step 5: Solve for x
    x = 322,730,818,947.16/551,268.72
  6. Step 6: Final answer
    x = 585,432.85

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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.