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Finding the Fourth Proportional to 978,785.64, 1,350,786.24 and 549,093.60

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Solution

The fourth proportional to 978,785.64, 1,350,786.24 and 549,093.60 is: 757,783.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,785.64 : 1,350,786.24 = 549,093.60 : x
  2. Step 2: Convert to fraction form
    978,785.64/1,350,786.24 = 549,093.60/x
  3. Step 3: Cross multiply
    978,785.64x = 1,350,786.24 × 549,093.60
  4. Step 4: Simplify right side
    978,785.64x = 741,708,079,352.06
  5. Step 5: Solve for x
    x = 741,708,079,352.06/978,785.64
  6. Step 6: Final answer
    x = 757,783.98

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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.