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Finding the Fourth Proportional to 620,238.42, 855,880.29 and 351,966.42

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Solution

The fourth proportional to 620,238.42, 855,880.29 and 351,966.42 is: 485,686.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,238.42 : 855,880.29 = 351,966.42 : x
  2. Step 2: Convert to fraction form
    620,238.42/855,880.29 = 351,966.42/x
  3. Step 3: Cross multiply
    620,238.42x = 855,880.29 × 351,966.42
  4. Step 4: Simplify right side
    620,238.42x = 301,241,121,619.86
  5. Step 5: Solve for x
    x = 301,241,121,619.86/620,238.42
  6. Step 6: Final answer
    x = 485,686.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.