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Finding the Fourth Proportional to 278,651.58, 384,656.85 and 188,130.12

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Solution

The fourth proportional to 278,651.58, 384,656.85 and 188,130.12 is: 259,699.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,651.58 : 384,656.85 = 188,130.12 : x
  2. Step 2: Convert to fraction form
    278,651.58/384,656.85 = 188,130.12/x
  3. Step 3: Cross multiply
    278,651.58x = 384,656.85 × 188,130.12
  4. Step 4: Simplify right side
    278,651.58x = 72,365,539,349.32
  5. Step 5: Solve for x
    x = 72,365,539,349.32/278,651.58
  6. Step 6: Final answer
    x = 259,699.01

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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.