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Finding the Fourth Proportional to 869,343.91, 1,199,693.78 and 487,370.77

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Solution

The fourth proportional to 869,343.91, 1,199,693.78 and 487,370.77 is: 672,571.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,343.91 : 1,199,693.78 = 487,370.77 : x
  2. Step 2: Convert to fraction form
    869,343.91/1,199,693.78 = 487,370.77/x
  3. Step 3: Cross multiply
    869,343.91x = 1,199,693.78 × 487,370.77
  4. Step 4: Simplify right side
    869,343.91x = 584,695,681,322.81
  5. Step 5: Solve for x
    x = 584,695,681,322.81/869,343.91
  6. Step 6: Final answer
    x = 672,571.21

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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.