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Finding the Fourth Proportional to 412,328.40, 618,492.60 and 398,550.30

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Solution

The fourth proportional to 412,328.40, 618,492.60 and 398,550.30 is: 597,825.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,328.40 : 618,492.60 = 398,550.30 : x
  2. Step 2: Convert to fraction form
    412,328.40/618,492.60 = 398,550.30/x
  3. Step 3: Cross multiply
    412,328.40x = 618,492.60 × 398,550.30
  4. Step 4: Simplify right side
    412,328.40x = 246,500,411,277.78
  5. Step 5: Solve for x
    x = 246,500,411,277.78/412,328.40
  6. Step 6: Final answer
    x = 597,825.45

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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.