Home / 638,424.48-881,028.45-351,938.28

Finding the Fourth Proportional to 638,424.48, 881,028.45 and 351,938.28

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Solution

The fourth proportional to 638,424.48, 881,028.45 and 351,938.28 is: 485,676.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,424.48 : 881,028.45 = 351,938.28 : x
  2. Step 2: Convert to fraction form
    638,424.48/881,028.45 = 351,938.28/x
  3. Step 3: Cross multiply
    638,424.48x = 881,028.45 × 351,938.28
  4. Step 4: Simplify right side
    638,424.48x = 310,067,637,324.07
  5. Step 5: Solve for x
    x = 310,067,637,324.07/638,424.48
  6. Step 6: Final answer
    x = 485,676.30

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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.