Home / 315,623.40-472,268.70-287,629.80

Finding the Fourth Proportional to 315,623.40, 472,268.70 and 287,629.80

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Solution

The fourth proportional to 315,623.40, 472,268.70 and 287,629.80 is: 430,381.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,623.40 : 472,268.70 = 287,629.80 : x
  2. Step 2: Convert to fraction form
    315,623.40/472,268.70 = 287,629.80/x
  3. Step 3: Cross multiply
    315,623.40x = 472,268.70 × 287,629.80
  4. Step 4: Simplify right side
    315,623.40x = 135,838,551,727.26
  5. Step 5: Solve for x
    x = 135,838,551,727.26/315,623.40
  6. Step 6: Final answer
    x = 430,381.75

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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.