Home / 638,431.47-881,041.32-351,961.79

Finding the Fourth Proportional to 638,431.47, 881,041.32 and 351,961.79

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Solution

The fourth proportional to 638,431.47, 881,041.32 and 351,961.79 is: 485,710.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,431.47 : 881,041.32 = 351,961.79 : x
  2. Step 2: Convert to fraction form
    638,431.47/881,041.32 = 351,961.79/x
  3. Step 3: Cross multiply
    638,431.47x = 881,041.32 × 351,961.79
  4. Step 4: Simplify right side
    638,431.47x = 310,092,875,645.96
  5. Step 5: Solve for x
    x = 310,092,875,645.96/638,431.47
  6. Step 6: Final answer
    x = 485,710.51

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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.