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Finding the Fourth Proportional to 978,425.32, 1,349,653.62 and 615,273.16

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Solution

The fourth proportional to 978,425.32, 1,349,653.62 and 615,273.16 is: 848,716.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,425.32 : 1,349,653.62 = 615,273.16 : x
  2. Step 2: Convert to fraction form
    978,425.32/1,349,653.62 = 615,273.16/x
  3. Step 3: Cross multiply
    978,425.32x = 1,349,653.62 × 615,273.16
  4. Step 4: Simplify right side
    978,425.32x = 830,405,647,682.84
  5. Step 5: Solve for x
    x = 830,405,647,682.84/978,425.32
  6. Step 6: Final answer
    x = 848,716.43

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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.