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Finding the Fourth Proportional to 340,931.28, 511,396.48 and 91,613.28

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Solution

The fourth proportional to 340,931.28, 511,396.48 and 91,613.28 is: 137,419.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,931.28 : 511,396.48 = 91,613.28 : x
  2. Step 2: Convert to fraction form
    340,931.28/511,396.48 = 91,613.28/x
  3. Step 3: Cross multiply
    340,931.28x = 511,396.48 × 91,613.28
  4. Step 4: Simplify right side
    340,931.28x = 46,850,708,913.25
  5. Step 5: Solve for x
    x = 46,850,708,913.25/340,931.28
  6. Step 6: Final answer
    x = 137,419.80

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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.