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Finding the Fourth Proportional to 386,643.87, 579,674.07 and 253,557.63

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Solution

The fourth proportional to 386,643.87, 579,674.07 and 253,557.63 is: 380,145.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,643.87 : 579,674.07 = 253,557.63 : x
  2. Step 2: Convert to fraction form
    386,643.87/579,674.07 = 253,557.63/x
  3. Step 3: Cross multiply
    386,643.87x = 579,674.07 × 253,557.63
  4. Step 4: Simplify right side
    386,643.87x = 146,980,783,361.65
  5. Step 5: Solve for x
    x = 146,980,783,361.65/386,643.87
  6. Step 6: Final answer
    x = 380,145.13

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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.