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Finding the Fourth Proportional to 651,638.40, 978,332.40 and 416,025.60

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Solution

The fourth proportional to 651,638.40, 978,332.40 and 416,025.60 is: 624,596.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,638.40 : 978,332.40 = 416,025.60 : x
  2. Step 2: Convert to fraction form
    651,638.40/978,332.40 = 416,025.60/x
  3. Step 3: Cross multiply
    651,638.40x = 978,332.40 × 416,025.60
  4. Step 4: Simplify right side
    651,638.40x = 407,011,323,709.44
  5. Step 5: Solve for x
    x = 407,011,323,709.44/651,638.40
  6. Step 6: Final answer
    x = 624,596.90

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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.