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Finding the Fourth Proportional to 547,428.40, 821,142.60 and 396,962.80

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Solution

The fourth proportional to 547,428.40, 821,142.60 and 396,962.80 is: 595,444.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,428.40 : 821,142.60 = 396,962.80 : x
  2. Step 2: Convert to fraction form
    547,428.40/821,142.60 = 396,962.80/x
  3. Step 3: Cross multiply
    547,428.40x = 821,142.60 × 396,962.80
  4. Step 4: Simplify right side
    547,428.40x = 325,963,065,695.28
  5. Step 5: Solve for x
    x = 325,963,065,695.28/547,428.40
  6. Step 6: Final answer
    x = 595,444.20

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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.