Home / 287,554.20-431,331.30-145,836.60

Finding the Fourth Proportional to 287,554.20, 431,331.30 and 145,836.60

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Solution

The fourth proportional to 287,554.20, 431,331.30 and 145,836.60 is: 218,754.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,554.20 : 431,331.30 = 145,836.60 : x
  2. Step 2: Convert to fraction form
    287,554.20/431,331.30 = 145,836.60/x
  3. Step 3: Cross multiply
    287,554.20x = 431,331.30 × 145,836.60
  4. Step 4: Simplify right side
    287,554.20x = 62,903,890,265.58
  5. Step 5: Solve for x
    x = 62,903,890,265.58/287,554.20
  6. Step 6: Final answer
    x = 218,754.90

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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.