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Finding the Fourth Proportional to 493,782.39, 681,433.70 and 278,931.51

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Solution

The fourth proportional to 493,782.39, 681,433.70 and 278,931.51 is: 384,933.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,782.39 : 681,433.70 = 278,931.51 : x
  2. Step 2: Convert to fraction form
    493,782.39/681,433.70 = 278,931.51/x
  3. Step 3: Cross multiply
    493,782.39x = 681,433.70 × 278,931.51
  4. Step 4: Simplify right side
    493,782.39x = 190,073,329,511.23
  5. Step 5: Solve for x
    x = 190,073,329,511.23/493,782.39
  6. Step 6: Final answer
    x = 384,933.39

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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.