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Finding the Fourth Proportional to 672,114.40, 1,008,368.40 and 198,812.40

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Solution

The fourth proportional to 672,114.40, 1,008,368.40 and 198,812.40 is: 298,276.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,114.40 : 1,008,368.40 = 198,812.40 : x
  2. Step 2: Convert to fraction form
    672,114.40/1,008,368.40 = 198,812.40/x
  3. Step 3: Cross multiply
    672,114.40x = 1,008,368.40 × 198,812.40
  4. Step 4: Simplify right side
    672,114.40x = 200,476,141,688.16
  5. Step 5: Solve for x
    x = 200,476,141,688.16/672,114.40
  6. Step 6: Final answer
    x = 298,276.81

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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.