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Finding the Fourth Proportional to 438,441.60, 657,662.40 and 399,734.40

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Solution

The fourth proportional to 438,441.60, 657,662.40 and 399,734.40 is: 599,601.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,441.60 : 657,662.40 = 399,734.40 : x
  2. Step 2: Convert to fraction form
    438,441.60/657,662.40 = 399,734.40/x
  3. Step 3: Cross multiply
    438,441.60x = 657,662.40 × 399,734.40
  4. Step 4: Simplify right side
    438,441.60x = 262,890,284,866.56
  5. Step 5: Solve for x
    x = 262,890,284,866.56/438,441.60
  6. Step 6: Final answer
    x = 599,601.60

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1.5x scale

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.