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Finding the Fourth Proportional to 612,181.20, 918,271.80 and 543,946.80

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Solution

The fourth proportional to 612,181.20, 918,271.80 and 543,946.80 is: 815,920.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,181.20 : 918,271.80 = 543,946.80 : x
  2. Step 2: Convert to fraction form
    612,181.20/918,271.80 = 543,946.80/x
  3. Step 3: Cross multiply
    612,181.20x = 918,271.80 × 543,946.80
  4. Step 4: Simplify right side
    612,181.20x = 499,491,007,140.24
  5. Step 5: Solve for x
    x = 499,491,007,140.24/612,181.20
  6. Step 6: Final answer
    x = 815,920.20

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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.