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Finding the Fourth Proportional to 386,695.17, 580,042.80 and 120,477.15

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Solution

The fourth proportional to 386,695.17, 580,042.80 and 120,477.15 is: 180,715.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,695.17 : 580,042.80 = 120,477.15 : x
  2. Step 2: Convert to fraction form
    386,695.17/580,042.80 = 120,477.15/x
  3. Step 3: Cross multiply
    386,695.17x = 580,042.80 × 120,477.15
  4. Step 4: Simplify right side
    386,695.17x = 69,881,903,422.02
  5. Step 5: Solve for x
    x = 69,881,903,422.02/386,695.17
  6. Step 6: Final answer
    x = 180,715.74

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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.