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Finding the Fourth Proportional to 715,448.42, 987,103.51 and 428,863.94

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Solution

The fourth proportional to 715,448.42, 987,103.51 and 428,863.94 is: 591,703.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,448.42 : 987,103.51 = 428,863.94 : x
  2. Step 2: Convert to fraction form
    715,448.42/987,103.51 = 428,863.94/x
  3. Step 3: Cross multiply
    715,448.42x = 987,103.51 × 428,863.94
  4. Step 4: Simplify right side
    715,448.42x = 423,333,095,550.91
  5. Step 5: Solve for x
    x = 423,333,095,550.91/715,448.42
  6. Step 6: Final answer
    x = 591,703.17

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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.