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Finding the Fourth Proportional to 493,579.34, 681,102.15 and 278,689.58

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Solution

The fourth proportional to 493,579.34, 681,102.15 and 278,689.58 is: 384,570.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,579.34 : 681,102.15 = 278,689.58 : x
  2. Step 2: Convert to fraction form
    493,579.34/681,102.15 = 278,689.58/x
  3. Step 3: Cross multiply
    493,579.34x = 681,102.15 × 278,689.58
  4. Step 4: Simplify right side
    493,579.34x = 189,816,068,715.09
  5. Step 5: Solve for x
    x = 189,816,068,715.09/493,579.34
  6. Step 6: Final answer
    x = 384,570.53

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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.