Home / 287,145.12-431,504.64-270,840.96

Finding the Fourth Proportional to 287,145.12, 431,504.64 and 270,840.96

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Solution

The fourth proportional to 287,145.12, 431,504.64 and 270,840.96 is: 407,003.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,145.12 : 431,504.64 = 270,840.96 : x
  2. Step 2: Convert to fraction form
    287,145.12/431,504.64 = 270,840.96/x
  3. Step 3: Cross multiply
    287,145.12x = 431,504.64 × 270,840.96
  4. Step 4: Simplify right side
    287,145.12x = 116,869,130,942.05
  5. Step 5: Solve for x
    x = 116,869,130,942.05/287,145.12
  6. Step 6: Final answer
    x = 407,003.72

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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.