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Finding the Fourth Proportional to 990,945.40, 1,486,418.10 and 990,945.40

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Solution

The fourth proportional to 990,945.40, 1,486,418.10 and 990,945.40 is: 1,486,418.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,945.40 : 1,486,418.10 = 990,945.40 : x
  2. Step 2: Convert to fraction form
    990,945.40/1,486,418.10 = 990,945.40/x
  3. Step 3: Cross multiply
    990,945.40x = 1,486,418.10 × 990,945.40
  4. Step 4: Simplify right side
    990,945.40x = 1,472,959,178,671.74
  5. Step 5: Solve for x
    x = 1,472,959,178,671.74/990,945.40
  6. Step 6: Final answer
    x = 1,486,418.10

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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.