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Finding the Fourth Proportional to 245,448.36, 338,720.76 and 138,017.46

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Solution

The fourth proportional to 245,448.36, 338,720.76 and 138,017.46 is: 190,465.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,448.36 : 338,720.76 = 138,017.46 : x
  2. Step 2: Convert to fraction form
    245,448.36/338,720.76 = 138,017.46/x
  3. Step 3: Cross multiply
    245,448.36x = 338,720.76 × 138,017.46
  4. Step 4: Simplify right side
    245,448.36x = 46,749,377,674.27
  5. Step 5: Solve for x
    x = 46,749,377,674.27/245,448.36
  6. Step 6: Final answer
    x = 190,465.22

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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.