Home / 1,278.06-1,762.23-1,153.65

Finding the Fourth Proportional to 1,278.06, 1,762.23 and 1,153.65

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Solution

The fourth proportional to 1,278.06, 1,762.23 and 1,153.65 is: 1,590.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.06 : 1,762.23 = 1,153.65 : x
  2. Step 2: Convert to fraction form
    1,278.06/1,762.23 = 1,153.65/x
  3. Step 3: Cross multiply
    1,278.06x = 1,762.23 × 1,153.65
  4. Step 4: Simplify right side
    1,278.06x = 2,032,996.64
  5. Step 5: Solve for x
    x = 2,032,996.64/1,278.06
  6. Step 6: Final answer
    x = 1,590.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.