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Finding the Fourth Proportional to 547,274.30, 820,911.45 and 494,130.20

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Solution

The fourth proportional to 547,274.30, 820,911.45 and 494,130.20 is: 741,195.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,274.30 : 820,911.45 = 494,130.20 : x
  2. Step 2: Convert to fraction form
    547,274.30/820,911.45 = 494,130.20/x
  3. Step 3: Cross multiply
    547,274.30x = 820,911.45 × 494,130.20
  4. Step 4: Simplify right side
    547,274.30x = 405,637,138,970.79
  5. Step 5: Solve for x
    x = 405,637,138,970.79/547,274.30
  6. Step 6: Final answer
    x = 741,195.30

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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.