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Finding the Fourth Proportional to 210,580.97, 315,853.70 and 90,633.07

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Solution

The fourth proportional to 210,580.97, 315,853.70 and 90,633.07 is: 135,941.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,580.97 : 315,853.70 = 90,633.07 : x
  2. Step 2: Convert to fraction form
    210,580.97/315,853.70 = 90,633.07/x
  3. Step 3: Cross multiply
    210,580.97x = 315,853.70 × 90,633.07
  4. Step 4: Simplify right side
    210,580.97x = 28,626,790,319.89
  5. Step 5: Solve for x
    x = 28,626,790,319.89/210,580.97
  6. Step 6: Final answer
    x = 135,941.97

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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.