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Finding the Fourth Proportional to 379,034.55, 523,059.98 and 217,888.20

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Solution

The fourth proportional to 379,034.55, 523,059.98 and 217,888.20 is: 300,681.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,034.55 : 523,059.98 = 217,888.20 : x
  2. Step 2: Convert to fraction form
    379,034.55/523,059.98 = 217,888.20/x
  3. Step 3: Cross multiply
    379,034.55x = 523,059.98 × 217,888.20
  4. Step 4: Simplify right side
    379,034.55x = 113,968,596,444.80
  5. Step 5: Solve for x
    x = 113,968,596,444.80/379,034.55
  6. Step 6: Final answer
    x = 300,681.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.