Home / 638,168.51-880,716.13-389,916.77

Finding the Fourth Proportional to 638,168.51, 880,716.13 and 389,916.77

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Solution

The fourth proportional to 638,168.51, 880,716.13 and 389,916.77 is: 538,111.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,168.51 : 880,716.13 = 389,916.77 : x
  2. Step 2: Convert to fraction form
    638,168.51/880,716.13 = 389,916.77/x
  3. Step 3: Cross multiply
    638,168.51x = 880,716.13 × 389,916.77
  4. Step 4: Simplify right side
    638,168.51x = 343,405,983,318.13
  5. Step 5: Solve for x
    x = 343,405,983,318.13/638,168.51
  6. Step 6: Final answer
    x = 538,111.76

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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.