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Finding the Fourth Proportional to 978,241.88, 1,349,400.42 and 615,090.20

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Solution

The fourth proportional to 978,241.88, 1,349,400.42 and 615,090.20 is: 848,463.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,241.88 : 1,349,400.42 = 615,090.20 : x
  2. Step 2: Convert to fraction form
    978,241.88/1,349,400.42 = 615,090.20/x
  3. Step 3: Cross multiply
    978,241.88x = 1,349,400.42 × 615,090.20
  4. Step 4: Simplify right side
    978,241.88x = 830,002,974,217.88
  5. Step 5: Solve for x
    x = 830,002,974,217.88/978,241.88
  6. Step 6: Final answer
    x = 848,463.95

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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.