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Finding the Fourth Proportional to 449,685.36, 620,280.44 and 342,019.34

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Solution

The fourth proportional to 449,685.36, 620,280.44 and 342,019.34 is: 471,769.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,685.36 : 620,280.44 = 342,019.34 : x
  2. Step 2: Convert to fraction form
    449,685.36/620,280.44 = 342,019.34/x
  3. Step 3: Cross multiply
    449,685.36x = 620,280.44 × 342,019.34
  4. Step 4: Simplify right side
    449,685.36x = 212,147,906,703.71
  5. Step 5: Solve for x
    x = 212,147,906,703.71/449,685.36
  6. Step 6: Final answer
    x = 471,769.65

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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.