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Finding the Fourth Proportional to 280,356.72, 386,901 and 159,515.52

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Solution

The fourth proportional to 280,356.72, 386,901 and 159,515.52 is: 220,136.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,356.72 : 386,901 = 159,515.52 : x
  2. Step 2: Convert to fraction form
    280,356.72/386,901 = 159,515.52/x
  3. Step 3: Cross multiply
    280,356.72x = 386,901 × 159,515.52
  4. Step 4: Simplify right side
    280,356.72x = 61,716,714,203.52
  5. Step 5: Solve for x
    x = 61,716,714,203.52/280,356.72
  6. Step 6: Final answer
    x = 220,136.38

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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.