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Finding the Fourth Proportional to 869,158.92, 1,199,494.74 and 487,185.80

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Solution

The fourth proportional to 869,158.92, 1,199,494.74 and 487,185.80 is: 672,347.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,158.92 : 1,199,494.74 = 487,185.80 : x
  2. Step 2: Convert to fraction form
    869,158.92/1,199,494.74 = 487,185.80/x
  3. Step 3: Cross multiply
    869,158.92x = 1,199,494.74 × 487,185.80
  4. Step 4: Simplify right side
    869,158.92x = 584,376,804,502.69
  5. Step 5: Solve for x
    x = 584,376,804,502.69/869,158.92
  6. Step 6: Final answer
    x = 672,347.47

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Double scale
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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.