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Finding the Fourth Proportional to 1,230,489.80, 1,845,734.70 and 981,657.80

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Solution

The fourth proportional to 1,230,489.80, 1,845,734.70 and 981,657.80 is: 1,472,486.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230,489.80 : 1,845,734.70 = 981,657.80 : x
  2. Step 2: Convert to fraction form
    1,230,489.80/1,845,734.70 = 981,657.80/x
  3. Step 3: Cross multiply
    1,230,489.80x = 1,845,734.70 × 981,657.80
  4. Step 4: Simplify right side
    1,230,489.80x = 1,811,879,864,985.66
  5. Step 5: Solve for x
    x = 1,811,879,864,985.66/1,230,489.80
  6. Step 6: Final answer
    x = 1,472,486.70

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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.