Home / 1,189,455.80-1,641,405.02-645,579.91

Finding the Fourth Proportional to 1,189,455.80, 1,641,405.02 and 645,579.91

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Solution

The fourth proportional to 1,189,455.80, 1,641,405.02 and 645,579.91 is: 890,876.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,455.80 : 1,641,405.02 = 645,579.91 : x
  2. Step 2: Convert to fraction form
    1,189,455.80/1,641,405.02 = 645,579.91/x
  3. Step 3: Cross multiply
    1,189,455.80x = 1,641,405.02 × 645,579.91
  4. Step 4: Simplify right side
    1,189,455.80x = 1,059,658,105,085.15
  5. Step 5: Solve for x
    x = 1,059,658,105,085.15/1,189,455.80
  6. Step 6: Final answer
    x = 890,876.40

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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.