Home / 1,728.42-2,385.21-942.45

Finding the Fourth Proportional to 1,728.42, 2,385.21 and 942.45

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Solution

The fourth proportional to 1,728.42, 2,385.21 and 942.45 is: 1,300.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.42 : 2,385.21 = 942.45 : x
  2. Step 2: Convert to fraction form
    1,728.42/2,385.21 = 942.45/x
  3. Step 3: Cross multiply
    1,728.42x = 2,385.21 × 942.45
  4. Step 4: Simplify right side
    1,728.42x = 2,247,941.16
  5. Step 5: Solve for x
    x = 2,247,941.16/1,728.42
  6. Step 6: Final answer
    x = 1,300.58

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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.