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Finding the Fourth Proportional to 280,628.16, 421,108.31 and 103,259.73

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Solution

The fourth proportional to 280,628.16, 421,108.31 and 103,259.73 is: 154,950.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,628.16 : 421,108.31 = 103,259.73 : x
  2. Step 2: Convert to fraction form
    280,628.16/421,108.31 = 103,259.73/x
  3. Step 3: Cross multiply
    280,628.16x = 421,108.31 × 103,259.73
  4. Step 4: Simplify right side
    280,628.16x = 43,483,530,391.36
  5. Step 5: Solve for x
    x = 43,483,530,391.36/280,628.16
  6. Step 6: Final answer
    x = 154,950.70

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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.