Home / 883.02-1,323.49-420.20

Finding the Fourth Proportional to 883.02, 1,323.49 and 420.20

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Solution

The fourth proportional to 883.02, 1,323.49 and 420.20 is: 629.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.02 : 1,323.49 = 420.20 : x
  2. Step 2: Convert to fraction form
    883.02/1,323.49 = 420.20/x
  3. Step 3: Cross multiply
    883.02x = 1,323.49 × 420.20
  4. Step 4: Simplify right side
    883.02x = 556,130.50
  5. Step 5: Solve for x
    x = 556,130.50/883.02
  6. Step 6: Final answer
    x = 629.81

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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.