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Finding the Fourth Proportional to 438,422.40, 657,633.60 and 389,433.60

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Solution

The fourth proportional to 438,422.40, 657,633.60 and 389,433.60 is: 584,150.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,422.40 : 657,633.60 = 389,433.60 : x
  2. Step 2: Convert to fraction form
    438,422.40/657,633.60 = 389,433.60/x
  3. Step 3: Cross multiply
    438,422.40x = 657,633.60 × 389,433.60
  4. Step 4: Simplify right side
    438,422.40x = 256,104,620,328.96
  5. Step 5: Solve for x
    x = 256,104,620,328.96/438,422.40
  6. Step 6: Final answer
    x = 584,150.40

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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.