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Finding the Fourth Proportional to 280,293.45, 420,571.40 and 122,501.40

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Solution

The fourth proportional to 280,293.45, 420,571.40 and 122,501.40 is: 183,809.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,293.45 : 420,571.40 = 122,501.40 : x
  2. Step 2: Convert to fraction form
    280,293.45/420,571.40 = 122,501.40/x
  3. Step 3: Cross multiply
    280,293.45x = 420,571.40 × 122,501.40
  4. Step 4: Simplify right side
    280,293.45x = 51,520,584,687.45
  5. Step 5: Solve for x
    x = 51,520,584,687.45/280,293.45
  6. Step 6: Final answer
    x = 183,809.45

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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.