Home / 641,675.28-885,501.14-355,189.20

Finding the Fourth Proportional to 641,675.28, 885,501.14 and 355,189.20

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Solution

The fourth proportional to 641,675.28, 885,501.14 and 355,189.20 is: 490,155.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,675.28 : 885,501.14 = 355,189.20 : x
  2. Step 2: Convert to fraction form
    641,675.28/885,501.14 = 355,189.20/x
  3. Step 3: Cross multiply
    641,675.28x = 885,501.14 × 355,189.20
  4. Step 4: Simplify right side
    641,675.28x = 314,520,441,515.69
  5. Step 5: Solve for x
    x = 314,520,441,515.69/641,675.28
  6. Step 6: Final answer
    x = 490,155.15

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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.