Home / 1,918.20-2,877.60-619.50

Finding the Fourth Proportional to 1,918.20, 2,877.60 and 619.50

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Solution

The fourth proportional to 1,918.20, 2,877.60 and 619.50 is: 929.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.20 : 2,877.60 = 619.50 : x
  2. Step 2: Convert to fraction form
    1,918.20/2,877.60 = 619.50/x
  3. Step 3: Cross multiply
    1,918.20x = 2,877.60 × 619.50
  4. Step 4: Simplify right side
    1,918.20x = 1,782,673.20
  5. Step 5: Solve for x
    x = 1,782,673.20/1,918.20
  6. Step 6: Final answer
    x = 929.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.