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Finding the Fourth Proportional to 280,518.35, 387,130.28 and 159,698.57

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Solution

The fourth proportional to 280,518.35, 387,130.28 and 159,698.57 is: 220,392.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,518.35 : 387,130.28 = 159,698.57 : x
  2. Step 2: Convert to fraction form
    280,518.35/387,130.28 = 159,698.57/x
  3. Step 3: Cross multiply
    280,518.35x = 387,130.28 × 159,698.57
  4. Step 4: Simplify right side
    280,518.35x = 61,824,149,385.56
  5. Step 5: Solve for x
    x = 61,824,149,385.56/280,518.35
  6. Step 6: Final answer
    x = 220,392.53

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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.