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Finding the Fourth Proportional to 255,085.80, 382,616.55 and 86,589.60

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Solution

The fourth proportional to 255,085.80, 382,616.55 and 86,589.60 is: 129,880.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,085.80 : 382,616.55 = 86,589.60 : x
  2. Step 2: Convert to fraction form
    255,085.80/382,616.55 = 86,589.60/x
  3. Step 3: Cross multiply
    255,085.80x = 382,616.55 × 86,589.60
  4. Step 4: Simplify right side
    255,085.80x = 33,130,614,017.88
  5. Step 5: Solve for x
    x = 33,130,614,017.88/255,085.80
  6. Step 6: Final answer
    x = 129,880.28

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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.