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Finding the Fourth Proportional to 448,858.66, 618,864.69 and 287,448.34

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Solution

The fourth proportional to 448,858.66, 618,864.69 and 287,448.34 is: 396,319.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,858.66 : 618,864.69 = 287,448.34 : x
  2. Step 2: Convert to fraction form
    448,858.66/618,864.69 = 287,448.34/x
  3. Step 3: Cross multiply
    448,858.66x = 618,864.69 × 287,448.34
  4. Step 4: Simplify right side
    448,858.66x = 177,891,627,825.12
  5. Step 5: Solve for x
    x = 177,891,627,825.12/448,858.66
  6. Step 6: Final answer
    x = 396,319.92

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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.