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Finding the Fourth Proportional to 845,459.64, 1,267,820.82 and 319,779

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Solution

The fourth proportional to 845,459.64, 1,267,820.82 and 319,779 is: 479,529.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    845,459.64 : 1,267,820.82 = 319,779 : x
  2. Step 2: Convert to fraction form
    845,459.64/1,267,820.82 = 319,779/x
  3. Step 3: Cross multiply
    845,459.64x = 1,267,820.82 × 319,779
  4. Step 4: Simplify right side
    845,459.64x = 405,422,473,998.78
  5. Step 5: Solve for x
    x = 405,422,473,998.78/845,459.64
  6. Step 6: Final answer
    x = 479,529.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.