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Finding the Fourth Proportional to 386,603, 579,312.52 and 161,840.96

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Solution

The fourth proportional to 386,603, 579,312.52 and 161,840.96 is: 242,513.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,603 : 579,312.52 = 161,840.96 : x
  2. Step 2: Convert to fraction form
    386,603/579,312.52 = 161,840.96/x
  3. Step 3: Cross multiply
    386,603x = 579,312.52 × 161,840.96
  4. Step 4: Simplify right side
    386,603x = 93,756,494,376.82
  5. Step 5: Solve for x
    x = 93,756,494,376.82/386,603
  6. Step 6: Final answer
    x = 242,513.62

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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.