Home / 1,087.02-1,624.25-777.20

Finding the Fourth Proportional to 1,087.02, 1,624.25 and 777.20

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Solution

The fourth proportional to 1,087.02, 1,624.25 and 777.20 is: 1,161.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.02 : 1,624.25 = 777.20 : x
  2. Step 2: Convert to fraction form
    1,087.02/1,624.25 = 777.20/x
  3. Step 3: Cross multiply
    1,087.02x = 1,624.25 × 777.20
  4. Step 4: Simplify right side
    1,087.02x = 1,262,360.92
  5. Step 5: Solve for x
    x = 1,262,360.92/1,087.02
  6. Step 6: Final answer
    x = 1,161.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.