Home / 1,189,281.45-1,641,209.54-645,417.35

Finding the Fourth Proportional to 1,189,281.45, 1,641,209.54 and 645,417.35

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Solution

The fourth proportional to 1,189,281.45, 1,641,209.54 and 645,417.35 is: 890,676.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,281.45 : 1,641,209.54 = 645,417.35 : x
  2. Step 2: Convert to fraction form
    1,189,281.45/1,641,209.54 = 645,417.35/x
  3. Step 3: Cross multiply
    1,189,281.45x = 1,641,209.54 × 645,417.35
  4. Step 4: Simplify right side
    1,189,281.45x = 1,059,265,100,668.38
  5. Step 5: Solve for x
    x = 1,059,265,100,668.38/1,189,281.45
  6. Step 6: Final answer
    x = 890,676.55

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1.5x scale

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.