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Finding the Fourth Proportional to 661,252.67, 911,683.99 and 428,268.05

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Solution

The fourth proportional to 661,252.67, 911,683.99 and 428,268.05 is: 590,462.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,252.67 : 911,683.99 = 428,268.05 : x
  2. Step 2: Convert to fraction form
    661,252.67/911,683.99 = 428,268.05/x
  3. Step 3: Cross multiply
    661,252.67x = 911,683.99 × 428,268.05
  4. Step 4: Simplify right side
    661,252.67x = 390,445,124,613.52
  5. Step 5: Solve for x
    x = 390,445,124,613.52/661,252.67
  6. Step 6: Final answer
    x = 590,462.83

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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.