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Finding the Fourth Proportional to 386,312.10, 579,468.15 and 197,355.30

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Solution

The fourth proportional to 386,312.10, 579,468.15 and 197,355.30 is: 296,032.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,312.10 : 579,468.15 = 197,355.30 : x
  2. Step 2: Convert to fraction form
    386,312.10/579,468.15 = 197,355.30/x
  3. Step 3: Cross multiply
    386,312.10x = 579,468.15 × 197,355.30
  4. Step 4: Simplify right side
    386,312.10x = 114,361,110,583.70
  5. Step 5: Solve for x
    x = 114,361,110,583.70/386,312.10
  6. Step 6: Final answer
    x = 296,032.95

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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.