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Finding the Fourth Proportional to 255,615.40, 383,423.10 and 210,514.60

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Solution

The fourth proportional to 255,615.40, 383,423.10 and 210,514.60 is: 315,771.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,615.40 : 383,423.10 = 210,514.60 : x
  2. Step 2: Convert to fraction form
    255,615.40/383,423.10 = 210,514.60/x
  3. Step 3: Cross multiply
    255,615.40x = 383,423.10 × 210,514.60
  4. Step 4: Simplify right side
    255,615.40x = 80,716,160,527.26
  5. Step 5: Solve for x
    x = 80,716,160,527.26/255,615.40
  6. Step 6: Final answer
    x = 315,771.90

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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.