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Finding the Fourth Proportional to 386,700.80, 580,051.19 and 120,482.82

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Solution

The fourth proportional to 386,700.80, 580,051.19 and 120,482.82 is: 180,724.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,700.80 : 580,051.19 = 120,482.82 : x
  2. Step 2: Convert to fraction form
    386,700.80/580,051.19 = 120,482.82/x
  3. Step 3: Cross multiply
    386,700.80x = 580,051.19 × 120,482.82
  4. Step 4: Simplify right side
    386,700.80x = 69,886,203,416.76
  5. Step 5: Solve for x
    x = 69,886,203,416.76/386,700.80
  6. Step 6: Final answer
    x = 180,724.23

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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.