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Finding the Fourth Proportional to 255,074.80, 382,612.20 and 215,708.80

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Solution

The fourth proportional to 255,074.80, 382,612.20 and 215,708.80 is: 323,563.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,074.80 : 382,612.20 = 215,708.80 : x
  2. Step 2: Convert to fraction form
    255,074.80/382,612.20 = 215,708.80/x
  3. Step 3: Cross multiply
    255,074.80x = 382,612.20 × 215,708.80
  4. Step 4: Simplify right side
    255,074.80x = 82,532,818,527.36
  5. Step 5: Solve for x
    x = 82,532,818,527.36/255,074.80
  6. Step 6: Final answer
    x = 323,563.20

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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.