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Finding the Fourth Proportional to 255,511.76, 382,918.20 and 130,590.80

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Solution

The fourth proportional to 255,511.76, 382,918.20 and 130,590.80 is: 195,707.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,511.76 : 382,918.20 = 130,590.80 : x
  2. Step 2: Convert to fraction form
    255,511.76/382,918.20 = 130,590.80/x
  3. Step 3: Cross multiply
    255,511.76x = 382,918.20 × 130,590.80
  4. Step 4: Simplify right side
    255,511.76x = 50,005,594,072.56
  5. Step 5: Solve for x
    x = 50,005,594,072.56/255,511.76
  6. Step 6: Final answer
    x = 195,707.60

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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.