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Finding the Fourth Proportional to 287,370.40, 431,055.33 and 135,532.05

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Solution

The fourth proportional to 287,370.40, 431,055.33 and 135,532.05 is: 203,297.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,370.40 : 431,055.33 = 135,532.05 : x
  2. Step 2: Convert to fraction form
    287,370.40/431,055.33 = 135,532.05/x
  3. Step 3: Cross multiply
    287,370.40x = 431,055.33 × 135,532.05
  4. Step 4: Simplify right side
    287,370.40x = 58,421,812,538.33
  5. Step 5: Solve for x
    x = 58,421,812,538.33/287,370.40
  6. Step 6: Final answer
    x = 203,297.95

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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.