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Finding the Fourth Proportional to 449,688.42, 620,605.40 and 256,104.32

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Solution

The fourth proportional to 449,688.42, 620,605.40 and 256,104.32 is: 353,444.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,688.42 : 620,605.40 = 256,104.32 : x
  2. Step 2: Convert to fraction form
    449,688.42/620,605.40 = 256,104.32/x
  3. Step 3: Cross multiply
    449,688.42x = 620,605.40 × 256,104.32
  4. Step 4: Simplify right side
    449,688.42x = 158,939,719,571.78
  5. Step 5: Solve for x
    x = 158,939,719,571.78/449,688.42
  6. Step 6: Final answer
    x = 353,444.10

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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.