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Finding the Fourth Proportional to 315,701.54, 435,771.95 and 251,288.93

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Solution

The fourth proportional to 315,701.54, 435,771.95 and 251,288.93 is: 346,861.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,701.54 : 435,771.95 = 251,288.93 : x
  2. Step 2: Convert to fraction form
    315,701.54/435,771.95 = 251,288.93/x
  3. Step 3: Cross multiply
    315,701.54x = 435,771.95 × 251,288.93
  4. Step 4: Simplify right side
    315,701.54x = 109,504,667,039.51
  5. Step 5: Solve for x
    x = 109,504,667,039.51/315,701.54
  6. Step 6: Final answer
    x = 346,861.36

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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.