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Finding the Fourth Proportional to 693,393.36, 956,878.08 and 387,470.49

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Solution

The fourth proportional to 693,393.36, 956,878.08 and 387,470.49 is: 534,706.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,393.36 : 956,878.08 = 387,470.49 : x
  2. Step 2: Convert to fraction form
    693,393.36/956,878.08 = 387,470.49/x
  3. Step 3: Cross multiply
    693,393.36x = 956,878.08 × 387,470.49
  4. Step 4: Simplify right side
    693,393.36x = 370,762,018,527.86
  5. Step 5: Solve for x
    x = 370,762,018,527.86/693,393.36
  6. Step 6: Final answer
    x = 534,706.62

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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.