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Finding the Fourth Proportional to 978,059.80, 1,464,756.90 and 478,840.60

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Solution

The fourth proportional to 978,059.80, 1,464,756.90 and 478,840.60 is: 717,118.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,059.80 : 1,464,756.90 = 478,840.60 : x
  2. Step 2: Convert to fraction form
    978,059.80/1,464,756.90 = 478,840.60/x
  3. Step 3: Cross multiply
    978,059.80x = 1,464,756.90 × 478,840.60
  4. Step 4: Simplify right side
    978,059.80x = 701,385,072,850.14
  5. Step 5: Solve for x
    x = 701,385,072,850.14/978,059.80
  6. Step 6: Final answer
    x = 717,118.80

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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.