Home / 1,152.02-1,727.67-421.70

Finding the Fourth Proportional to 1,152.02, 1,727.67 and 421.70

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Solution

The fourth proportional to 1,152.02, 1,727.67 and 421.70 is: 632.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,152.02 : 1,727.67 = 421.70 : x
  2. Step 2: Convert to fraction form
    1,152.02/1,727.67 = 421.70/x
  3. Step 3: Cross multiply
    1,152.02x = 1,727.67 × 421.70
  4. Step 4: Simplify right side
    1,152.02x = 728,558.44
  5. Step 5: Solve for x
    x = 728,558.44/1,152.02
  6. Step 6: Final answer
    x = 632.42

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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.