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Finding the Fourth Proportional to 449,807.92, 621,199.74 and 389,087.08

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Solution

The fourth proportional to 449,807.92, 621,199.74 and 389,087.08 is: 537,342.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,807.92 : 621,199.74 = 389,087.08 : x
  2. Step 2: Convert to fraction form
    449,807.92/621,199.74 = 389,087.08/x
  3. Step 3: Cross multiply
    449,807.92x = 621,199.74 × 389,087.08
  4. Step 4: Simplify right side
    449,807.92x = 241,700,792,933.36
  5. Step 5: Solve for x
    x = 241,700,792,933.36/449,807.92
  6. Step 6: Final answer
    x = 537,342.23

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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.