Home / 1,386,913.80-2,080,370.70-721,979.40

Finding the Fourth Proportional to 1,386,913.80, 2,080,370.70 and 721,979.40

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Solution

The fourth proportional to 1,386,913.80, 2,080,370.70 and 721,979.40 is: 1,082,969.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386,913.80 : 2,080,370.70 = 721,979.40 : x
  2. Step 2: Convert to fraction form
    1,386,913.80/2,080,370.70 = 721,979.40/x
  3. Step 3: Cross multiply
    1,386,913.80x = 2,080,370.70 × 721,979.40
  4. Step 4: Simplify right side
    1,386,913.80x = 1,501,984,789,763.58
  5. Step 5: Solve for x
    x = 1,501,984,789,763.58/1,386,913.80
  6. Step 6: Final answer
    x = 1,082,969.10

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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.