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Finding the Fourth Proportional to 693,134.72, 956,515.35 and 387,215.48

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Solution

The fourth proportional to 693,134.72, 956,515.35 and 387,215.48 is: 534,351.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,134.72 : 956,515.35 = 387,215.48 : x
  2. Step 2: Convert to fraction form
    693,134.72/956,515.35 = 387,215.48/x
  3. Step 3: Cross multiply
    693,134.72x = 956,515.35 × 387,215.48
  4. Step 4: Simplify right side
    693,134.72x = 370,377,550,377.62
  5. Step 5: Solve for x
    x = 370,377,550,377.62/693,134.72
  6. Step 6: Final answer
    x = 534,351.46

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1.5x scale

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.