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Finding the Fourth Proportional to 315,991.64, 473,987.52 and 105,629.60

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Solution

The fourth proportional to 315,991.64, 473,987.52 and 105,629.60 is: 158,444.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,991.64 : 473,987.52 = 105,629.60 : x
  2. Step 2: Convert to fraction form
    315,991.64/473,987.52 = 105,629.60/x
  3. Step 3: Cross multiply
    315,991.64x = 473,987.52 × 105,629.60
  4. Step 4: Simplify right side
    315,991.64x = 50,067,112,142.59
  5. Step 5: Solve for x
    x = 50,067,112,142.59/315,991.64
  6. Step 6: Final answer
    x = 158,444.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.