Home / 1,075.23-1,618.34-916.65

Finding the Fourth Proportional to 1,075.23, 1,618.34 and 916.65

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Solution

The fourth proportional to 1,075.23, 1,618.34 and 916.65 is: 1,379.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,075.23 : 1,618.34 = 916.65 : x
  2. Step 2: Convert to fraction form
    1,075.23/1,618.34 = 916.65/x
  3. Step 3: Cross multiply
    1,075.23x = 1,618.34 × 916.65
  4. Step 4: Simplify right side
    1,075.23x = 1,483,446.78
  5. Step 5: Solve for x
    x = 1,483,446.78/1,075.23
  6. Step 6: Final answer
    x = 1,379.66

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.