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Finding the Fourth Proportional to 543,485.40, 815,228.10 and 343,156.20

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Solution

The fourth proportional to 543,485.40, 815,228.10 and 343,156.20 is: 514,734.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,485.40 : 815,228.10 = 343,156.20 : x
  2. Step 2: Convert to fraction form
    543,485.40/815,228.10 = 343,156.20/x
  3. Step 3: Cross multiply
    543,485.40x = 815,228.10 × 343,156.20
  4. Step 4: Simplify right side
    543,485.40x = 279,750,576,929.22
  5. Step 5: Solve for x
    x = 279,750,576,929.22/543,485.40
  6. Step 6: Final answer
    x = 514,734.30

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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.