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Finding the Fourth Proportional to 390,764.63, 585,093.04 and 255,493.22

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Solution

The fourth proportional to 390,764.63, 585,093.04 and 255,493.22 is: 382,550.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,764.63 : 585,093.04 = 255,493.22 : x
  2. Step 2: Convert to fraction form
    390,764.63/585,093.04 = 255,493.22/x
  3. Step 3: Cross multiply
    390,764.63x = 585,093.04 × 255,493.22
  4. Step 4: Simplify right side
    390,764.63x = 149,487,301,224.99
  5. Step 5: Solve for x
    x = 149,487,301,224.99/390,764.63
  6. Step 6: Final answer
    x = 382,550.74

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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.