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Finding the Fourth Proportional to 493,779.14, 681,429.22 and 278,928.26

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Solution

The fourth proportional to 493,779.14, 681,429.22 and 278,928.26 is: 384,928.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,779.14 : 681,429.22 = 278,928.26 : x
  2. Step 2: Convert to fraction form
    493,779.14/681,429.22 = 278,928.26/x
  3. Step 3: Cross multiply
    493,779.14x = 681,429.22 × 278,928.26
  4. Step 4: Simplify right side
    493,779.14x = 190,069,866,647.76
  5. Step 5: Solve for x
    x = 190,069,866,647.76/493,779.14
  6. Step 6: Final answer
    x = 384,928.91

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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.