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Finding the Fourth Proportional to 693,054.62, 956,418.71 and 387,143.89

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Solution

The fourth proportional to 693,054.62, 956,418.71 and 387,143.89 is: 534,260.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,054.62 : 956,418.71 = 387,143.89 : x
  2. Step 2: Convert to fraction form
    693,054.62/956,418.71 = 387,143.89/x
  3. Step 3: Cross multiply
    693,054.62x = 956,418.71 × 387,143.89
  4. Step 4: Simplify right side
    693,054.62x = 370,271,659,858.18
  5. Step 5: Solve for x
    x = 370,271,659,858.18/693,054.62
  6. Step 6: Final answer
    x = 534,260.43

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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.