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Finding the Fourth Proportional to 280,483.21, 387,068.93 and 159,633.69

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Solution

The fourth proportional to 280,483.21, 387,068.93 and 159,633.69 is: 220,295.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,483.21 : 387,068.93 = 159,633.69 : x
  2. Step 2: Convert to fraction form
    280,483.21/387,068.93 = 159,633.69/x
  3. Step 3: Cross multiply
    280,483.21x = 387,068.93 × 159,633.69
  4. Step 4: Simplify right side
    280,483.21x = 61,789,239,929.20
  5. Step 5: Solve for x
    x = 61,789,239,929.20/280,483.21
  6. Step 6: Final answer
    x = 220,295.69

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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.