Home / 1,385.05-2,075.40-1,178.77

Finding the Fourth Proportional to 1,385.05, 2,075.40 and 1,178.77

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Solution

The fourth proportional to 1,385.05, 2,075.40 and 1,178.77 is: 1,766.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.05 : 2,075.40 = 1,178.77 : x
  2. Step 2: Convert to fraction form
    1,385.05/2,075.40 = 1,178.77/x
  3. Step 3: Cross multiply
    1,385.05x = 2,075.40 × 1,178.77
  4. Step 4: Simplify right side
    1,385.05x = 2,446,419.26
  5. Step 5: Solve for x
    x = 2,446,419.26/1,385.05
  6. Step 6: Final answer
    x = 1,766.30

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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.