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Finding the Fourth Proportional to 309,643.44, 427,342.08 and 173,690.64

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Solution

The fourth proportional to 309,643.44, 427,342.08 and 173,690.64 is: 239,712.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,643.44 : 427,342.08 = 173,690.64 : x
  2. Step 2: Convert to fraction form
    309,643.44/427,342.08 = 173,690.64/x
  3. Step 3: Cross multiply
    309,643.44x = 427,342.08 × 173,690.64
  4. Step 4: Simplify right side
    309,643.44x = 74,225,319,374.13
  5. Step 5: Solve for x
    x = 74,225,319,374.13/309,643.44
  6. Step 6: Final answer
    x = 239,712.23

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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.