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Finding the Fourth Proportional to 493,780.14, 681,430.60 and 278,929.26

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Solution

The fourth proportional to 493,780.14, 681,430.60 and 278,929.26 is: 384,930.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,780.14 : 681,430.60 = 278,929.26 : x
  2. Step 2: Convert to fraction form
    493,780.14/681,430.60 = 278,929.26/x
  3. Step 3: Cross multiply
    493,780.14x = 681,430.60 × 278,929.26
  4. Step 4: Simplify right side
    493,780.14x = 190,070,932,999.36
  5. Step 5: Solve for x
    x = 190,070,932,999.36/493,780.14
  6. Step 6: Final answer
    x = 384,930.29

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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.