Home / 1,189,281.78-1,641,220.88-645,422.27

Finding the Fourth Proportional to 1,189,281.78, 1,641,220.88 and 645,422.27

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Solution

The fourth proportional to 1,189,281.78, 1,641,220.88 and 645,422.27 is: 890,689.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,281.78 : 1,641,220.88 = 645,422.27 : x
  2. Step 2: Convert to fraction form
    1,189,281.78/1,641,220.88 = 645,422.27/x
  3. Step 3: Cross multiply
    1,189,281.78x = 1,641,220.88 × 645,422.27
  4. Step 4: Simplify right side
    1,189,281.78x = 1,059,280,494,507.78
  5. Step 5: Solve for x
    x = 1,059,280,494,507.78/1,189,281.78
  6. Step 6: Final answer
    x = 890,689.25

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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.