Home / 1,728.96-2,386.76-1,056.81

Finding the Fourth Proportional to 1,728.96, 2,386.76 and 1,056.81

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Solution

The fourth proportional to 1,728.96, 2,386.76 and 1,056.81 is: 1,458.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.96 : 2,386.76 = 1,056.81 : x
  2. Step 2: Convert to fraction form
    1,728.96/2,386.76 = 1,056.81/x
  3. Step 3: Cross multiply
    1,728.96x = 2,386.76 × 1,056.81
  4. Step 4: Simplify right side
    1,728.96x = 2,522,346.55
  5. Step 5: Solve for x
    x = 2,522,346.55/1,728.96
  6. Step 6: Final answer
    x = 1,458.88

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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.