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Finding the Fourth Proportional to 280,640.45, 387,301.67 and 159,792.30

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Solution

The fourth proportional to 280,640.45, 387,301.67 and 159,792.30 is: 220,523.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,640.45 : 387,301.67 = 159,792.30 : x
  2. Step 2: Convert to fraction form
    280,640.45/387,301.67 = 159,792.30/x
  3. Step 3: Cross multiply
    280,640.45x = 387,301.67 × 159,792.30
  4. Step 4: Simplify right side
    280,640.45x = 61,887,824,643.14
  5. Step 5: Solve for x
    x = 61,887,824,643.14/280,640.45
  6. Step 6: Final answer
    x = 220,523.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.