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Finding the Fourth Proportional to 245,813.77, 339,222.63 and 138,418.40

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Solution

The fourth proportional to 245,813.77, 339,222.63 and 138,418.40 is: 191,017.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,813.77 : 339,222.63 = 138,418.40 : x
  2. Step 2: Convert to fraction form
    245,813.77/339,222.63 = 138,418.40/x
  3. Step 3: Cross multiply
    245,813.77x = 339,222.63 × 138,418.40
  4. Step 4: Simplify right side
    245,813.77x = 46,954,655,055.52
  5. Step 5: Solve for x
    x = 46,954,655,055.52/245,813.77
  6. Step 6: Final answer
    x = 191,017.19

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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.