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Finding the Fourth Proportional to 398,977.80, 598,466.70 and 366,318.60

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Solution

The fourth proportional to 398,977.80, 598,466.70 and 366,318.60 is: 549,477.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,977.80 : 598,466.70 = 366,318.60 : x
  2. Step 2: Convert to fraction form
    398,977.80/598,466.70 = 366,318.60/x
  3. Step 3: Cross multiply
    398,977.80x = 598,466.70 × 366,318.60
  4. Step 4: Simplify right side
    398,977.80x = 219,229,483,690.62
  5. Step 5: Solve for x
    x = 219,229,483,690.62/398,977.80
  6. Step 6: Final answer
    x = 549,477.90

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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.