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Finding the Fourth Proportional to 280,625.40, 420,938.10 and 242,571.60

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Solution

The fourth proportional to 280,625.40, 420,938.10 and 242,571.60 is: 363,857.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,625.40 : 420,938.10 = 242,571.60 : x
  2. Step 2: Convert to fraction form
    280,625.40/420,938.10 = 242,571.60/x
  3. Step 3: Cross multiply
    280,625.40x = 420,938.10 × 242,571.60
  4. Step 4: Simplify right side
    280,625.40x = 102,107,628,417.96
  5. Step 5: Solve for x
    x = 102,107,628,417.96/280,625.40
  6. Step 6: Final answer
    x = 363,857.40

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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.