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Finding the Fourth Proportional to 259,354.61, 389,051.96 and 99,507.05

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Solution

The fourth proportional to 259,354.61, 389,051.96 and 99,507.05 is: 149,268.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,354.61 : 389,051.96 = 99,507.05 : x
  2. Step 2: Convert to fraction form
    259,354.61/389,051.96 = 99,507.05/x
  3. Step 3: Cross multiply
    259,354.61x = 389,051.96 × 99,507.05
  4. Step 4: Simplify right side
    259,354.61x = 38,713,410,393.52
  5. Step 5: Solve for x
    x = 38,713,410,393.52/259,354.61
  6. Step 6: Final answer
    x = 149,268.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.