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Finding the Fourth Proportional to 644,847.40, 967,271.10 and 407,420.20

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Solution

The fourth proportional to 644,847.40, 967,271.10 and 407,420.20 is: 611,130.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,847.40 : 967,271.10 = 407,420.20 : x
  2. Step 2: Convert to fraction form
    644,847.40/967,271.10 = 407,420.20/x
  3. Step 3: Cross multiply
    644,847.40x = 967,271.10 × 407,420.20
  4. Step 4: Simplify right side
    644,847.40x = 394,085,785,016.22
  5. Step 5: Solve for x
    x = 394,085,785,016.22/644,847.40
  6. Step 6: Final answer
    x = 611,130.30

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Double scale
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Similar ratio
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1.5x scale

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.