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Finding the Fourth Proportional to 255,256.80, 382,920.12 and 86,731.80

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Solution

The fourth proportional to 255,256.80, 382,920.12 and 86,731.80 is: 130,109.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,256.80 : 382,920.12 = 86,731.80 : x
  2. Step 2: Convert to fraction form
    255,256.80/382,920.12 = 86,731.80/x
  3. Step 3: Cross multiply
    255,256.80x = 382,920.12 × 86,731.80
  4. Step 4: Simplify right side
    255,256.80x = 33,211,351,263.82
  5. Step 5: Solve for x
    x = 33,211,351,263.82/255,256.80
  6. Step 6: Final answer
    x = 130,109.57

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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.