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Finding the Fourth Proportional to 654,328.20, 918,159 and 654,328.20

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Solution

The fourth proportional to 654,328.20, 918,159 and 654,328.20 is: 918,159

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,328.20 : 918,159 = 654,328.20 : x
  2. Step 2: Convert to fraction form
    654,328.20/918,159 = 654,328.20/x
  3. Step 3: Cross multiply
    654,328.20x = 918,159 × 654,328.20
  4. Step 4: Simplify right side
    654,328.20x = 600,777,325,783.80
  5. Step 5: Solve for x
    x = 600,777,325,783.80/654,328.20
  6. Step 6: Final answer
    x = 918,159

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.