Home / 423,905.35-636,350.10-255,615.70

Finding the Fourth Proportional to 423,905.35, 636,350.10 and 255,615.70

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Solution

The fourth proportional to 423,905.35, 636,350.10 and 255,615.70 is: 383,720.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,905.35 : 636,350.10 = 255,615.70 : x
  2. Step 2: Convert to fraction form
    423,905.35/636,350.10 = 255,615.70/x
  3. Step 3: Cross multiply
    423,905.35x = 636,350.10 × 255,615.70
  4. Step 4: Simplify right side
    423,905.35x = 162,661,076,256.57
  5. Step 5: Solve for x
    x = 162,661,076,256.57/423,905.35
  6. Step 6: Final answer
    x = 383,720.27

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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.