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Finding the Fourth Proportional to 3,075.30, 4,612.90 and 766.80

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Solution

The fourth proportional to 3,075.30, 4,612.90 and 766.80 is: 1,150.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,075.30 : 4,612.90 = 766.80 : x
  2. Step 2: Convert to fraction form
    3,075.30/4,612.90 = 766.80/x
  3. Step 3: Cross multiply
    3,075.30x = 4,612.90 × 766.80
  4. Step 4: Simplify right side
    3,075.30x = 3,537,171.72
  5. Step 5: Solve for x
    x = 3,537,171.72/3,075.30
  6. Step 6: Final answer
    x = 1,150.19

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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.