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Finding the Fourth Proportional to 654,331.20, 918,163.20 and 654,331.20

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Solution

The fourth proportional to 654,331.20, 918,163.20 and 654,331.20 is: 918,163.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,331.20 : 918,163.20 = 654,331.20 : x
  2. Step 2: Convert to fraction form
    654,331.20/918,163.20 = 654,331.20/x
  3. Step 3: Cross multiply
    654,331.20x = 918,163.20 × 654,331.20
  4. Step 4: Simplify right side
    654,331.20x = 600,782,828,451.84
  5. Step 5: Solve for x
    x = 600,782,828,451.84/654,331.20
  6. Step 6: Final answer
    x = 918,163.20

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Half scale
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Double scale
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1.5x scale

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.