Home / 990,930.15-1,389,168.45-990,930.15

Finding the Fourth Proportional to 990,930.15, 1,389,168.45 and 990,930.15

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Solution

The fourth proportional to 990,930.15, 1,389,168.45 and 990,930.15 is: 1,389,168.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,930.15 : 1,389,168.45 = 990,930.15 : x
  2. Step 2: Convert to fraction form
    990,930.15/1,389,168.45 = 990,930.15/x
  3. Step 3: Cross multiply
    990,930.15x = 1,389,168.45 × 990,930.15
  4. Step 4: Simplify right side
    990,930.15x = 1,376,568,900,533.77
  5. Step 5: Solve for x
    x = 1,376,568,900,533.77/990,930.15
  6. Step 6: Final answer
    x = 1,389,168.45

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.