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Finding the Fourth Proportional to 1,120,118.81, 1,678,906.63 and 984,921.20

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Solution

The fourth proportional to 1,120,118.81, 1,678,906.63 and 984,921.20 is: 1,476,263.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120,118.81 : 1,678,906.63 = 984,921.20 : x
  2. Step 2: Convert to fraction form
    1,120,118.81/1,678,906.63 = 984,921.20/x
  3. Step 3: Cross multiply
    1,120,118.81x = 1,678,906.63 × 984,921.20
  4. Step 4: Simplify right side
    1,120,118.81x = 1,653,590,731,840.07
  5. Step 5: Solve for x
    x = 1,653,590,731,840.07/1,120,118.81
  6. Step 6: Final answer
    x = 1,476,263.70

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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.