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Finding the Fourth Proportional to 845,007, 1,166,109.66 and 487,311

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Solution

The fourth proportional to 845,007, 1,166,109.66 and 487,311 is: 672,489.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    845,007 : 1,166,109.66 = 487,311 : x
  2. Step 2: Convert to fraction form
    845,007/1,166,109.66 = 487,311/x
  3. Step 3: Cross multiply
    845,007x = 1,166,109.66 × 487,311
  4. Step 4: Simplify right side
    845,007x = 568,258,064,524.26
  5. Step 5: Solve for x
    x = 568,258,064,524.26/845,007
  6. Step 6: Final answer
    x = 672,489.18

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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.