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Finding the Fourth Proportional to 245,374.84, 338,629.28 and 137,978.56

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Solution

The fourth proportional to 245,374.84, 338,629.28 and 137,978.56 is: 190,417.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,374.84 : 338,629.28 = 137,978.56 : x
  2. Step 2: Convert to fraction form
    245,374.84/338,629.28 = 137,978.56/x
  3. Step 3: Cross multiply
    245,374.84x = 338,629.28 × 137,978.56
  4. Step 4: Simplify right side
    245,374.84x = 46,723,580,428.24
  5. Step 5: Solve for x
    x = 46,723,580,428.24/245,374.84
  6. Step 6: Final answer
    x = 190,417.16

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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.