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Finding the Fourth Proportional to 651,679.40, 978,393.90 and 416,066.60

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Solution

The fourth proportional to 651,679.40, 978,393.90 and 416,066.60 is: 624,658.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,679.40 : 978,393.90 = 416,066.60 : x
  2. Step 2: Convert to fraction form
    651,679.40/978,393.90 = 416,066.60/x
  3. Step 3: Cross multiply
    651,679.40x = 978,393.90 × 416,066.60
  4. Step 4: Simplify right side
    651,679.40x = 407,077,023,433.74
  5. Step 5: Solve for x
    x = 407,077,023,433.74/651,679.40
  6. Step 6: Final answer
    x = 624,658.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.