Home / 1,324.89-1,985.20-777.53

Finding the Fourth Proportional to 1,324.89, 1,985.20 and 777.53

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Solution

The fourth proportional to 1,324.89, 1,985.20 and 777.53 is: 1,165.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324.89 : 1,985.20 = 777.53 : x
  2. Step 2: Convert to fraction form
    1,324.89/1,985.20 = 777.53/x
  3. Step 3: Cross multiply
    1,324.89x = 1,985.20 × 777.53
  4. Step 4: Simplify right side
    1,324.89x = 1,543,555.58
  5. Step 5: Solve for x
    x = 1,543,555.58/1,324.89
  6. Step 6: Final answer
    x = 1,165.04

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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.