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Finding the Fourth Proportional to 651,631.40, 978,321.90 and 416,018.60

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Solution

The fourth proportional to 651,631.40, 978,321.90 and 416,018.60 is: 624,586.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,631.40 : 978,321.90 = 416,018.60 : x
  2. Step 2: Convert to fraction form
    651,631.40/978,321.90 = 416,018.60/x
  3. Step 3: Cross multiply
    651,631.40x = 978,321.90 × 416,018.60
  4. Step 4: Simplify right side
    651,631.40x = 407,000,107,187.34
  5. Step 5: Solve for x
    x = 407,000,107,187.34/651,631.40
  6. Step 6: Final answer
    x = 624,586.40

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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.