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Finding the Fourth Proportional to 978,239.38, 1,349,396.97 and 615,087.70

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Solution

The fourth proportional to 978,239.38, 1,349,396.97 and 615,087.70 is: 848,460.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,239.38 : 1,349,396.97 = 615,087.70 : x
  2. Step 2: Convert to fraction form
    978,239.38/1,349,396.97 = 615,087.70/x
  3. Step 3: Cross multiply
    978,239.38x = 1,349,396.97 × 615,087.70
  4. Step 4: Simplify right side
    978,239.38x = 829,997,478,664.27
  5. Step 5: Solve for x
    x = 829,997,478,664.27/978,239.38
  6. Step 6: Final answer
    x = 848,460.51

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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.