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Finding the Fourth Proportional to 309,326.36, 426,905.80 and 173,397.02

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Solution

The fourth proportional to 309,326.36, 426,905.80 and 173,397.02 is: 239,307.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,326.36 : 426,905.80 = 173,397.02 : x
  2. Step 2: Convert to fraction form
    309,326.36/426,905.80 = 173,397.02/x
  3. Step 3: Cross multiply
    309,326.36x = 426,905.80 × 173,397.02
  4. Step 4: Simplify right side
    309,326.36x = 74,024,193,540.72
  5. Step 5: Solve for x
    x = 74,024,193,540.72/309,326.36
  6. Step 6: Final answer
    x = 239,307.74

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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.