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Finding the Fourth Proportional to 403,423.80, 605,135.70 and 370,246.20

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Solution

The fourth proportional to 403,423.80, 605,135.70 and 370,246.20 is: 555,369.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,423.80 : 605,135.70 = 370,246.20 : x
  2. Step 2: Convert to fraction form
    403,423.80/605,135.70 = 370,246.20/x
  3. Step 3: Cross multiply
    403,423.80x = 605,135.70 × 370,246.20
  4. Step 4: Simplify right side
    403,423.80x = 224,049,193,409.34
  5. Step 5: Solve for x
    x = 224,049,193,409.34/403,423.80
  6. Step 6: Final answer
    x = 555,369.30

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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.