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Finding the Fourth Proportional to 490,442.70, 677,141.20 and 438,598.94

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Solution

The fourth proportional to 490,442.70, 677,141.20 and 438,598.94 is: 605,561.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,442.70 : 677,141.20 = 438,598.94 : x
  2. Step 2: Convert to fraction form
    490,442.70/677,141.20 = 438,598.94/x
  3. Step 3: Cross multiply
    490,442.70x = 677,141.20 × 438,598.94
  4. Step 4: Simplify right side
    490,442.70x = 296,993,413,521.79
  5. Step 5: Solve for x
    x = 296,993,413,521.79/490,442.70
  6. Step 6: Final answer
    x = 605,561.90

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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.