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Finding the Fourth Proportional to 339,785.91, 509,680.47 and 103,130.64

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Solution

The fourth proportional to 339,785.91, 509,680.47 and 103,130.64 is: 154,696.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,785.91 : 509,680.47 = 103,130.64 : x
  2. Step 2: Convert to fraction form
    339,785.91/509,680.47 = 103,130.64/x
  3. Step 3: Cross multiply
    339,785.91x = 509,680.47 × 103,130.64
  4. Step 4: Simplify right side
    339,785.91x = 52,563,673,066.60
  5. Step 5: Solve for x
    x = 52,563,673,066.60/339,785.91
  6. Step 6: Final answer
    x = 154,696.45

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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.