Home / 1,189,516.10-1,641,488.05-645,640.18

Finding the Fourth Proportional to 1,189,516.10, 1,641,488.05 and 645,640.18

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Solution

The fourth proportional to 1,189,516.10, 1,641,488.05 and 645,640.18 is: 890,959.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,516.10 : 1,641,488.05 = 645,640.18 : x
  2. Step 2: Convert to fraction form
    1,189,516.10/1,641,488.05 = 645,640.18/x
  3. Step 3: Cross multiply
    1,189,516.10x = 1,641,488.05 × 645,640.18
  4. Step 4: Simplify right side
    1,189,516.10x = 1,059,810,636,357.76
  5. Step 5: Solve for x
    x = 1,059,810,636,357.76/1,189,516.10
  6. Step 6: Final answer
    x = 890,959.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.