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Finding the Fourth Proportional to 389,064.54, 583,651.40 and 136,287.15

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Solution

The fourth proportional to 389,064.54, 583,651.40 and 136,287.15 is: 204,449.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,064.54 : 583,651.40 = 136,287.15 : x
  2. Step 2: Convert to fraction form
    389,064.54/583,651.40 = 136,287.15/x
  3. Step 3: Cross multiply
    389,064.54x = 583,651.40 × 136,287.15
  4. Step 4: Simplify right side
    389,064.54x = 79,544,184,051.54
  5. Step 5: Solve for x
    x = 79,544,184,051.54/389,064.54
  6. Step 6: Final answer
    x = 204,449.84

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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.