Home / 1,309.18-1,806.75-916.33

Finding the Fourth Proportional to 1,309.18, 1,806.75 and 916.33

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Solution

The fourth proportional to 1,309.18, 1,806.75 and 916.33 is: 1,264.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,309.18 : 1,806.75 = 916.33 : x
  2. Step 2: Convert to fraction form
    1,309.18/1,806.75 = 916.33/x
  3. Step 3: Cross multiply
    1,309.18x = 1,806.75 × 916.33
  4. Step 4: Simplify right side
    1,309.18x = 1,655,579.23
  5. Step 5: Solve for x
    x = 1,655,579.23/1,309.18
  6. Step 6: Final answer
    x = 1,264.59

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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.