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Finding the Fourth Proportional to 386,443.30, 579,664.95 and 161,764.90

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Solution

The fourth proportional to 386,443.30, 579,664.95 and 161,764.90 is: 242,647.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,443.30 : 579,664.95 = 161,764.90 : x
  2. Step 2: Convert to fraction form
    386,443.30/579,664.95 = 161,764.90/x
  3. Step 3: Cross multiply
    386,443.30x = 579,664.95 × 161,764.90
  4. Step 4: Simplify right side
    386,443.30x = 93,769,442,670.26
  5. Step 5: Solve for x
    x = 93,769,442,670.26/386,443.30
  6. Step 6: Final answer
    x = 242,647.35

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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.