Home / 1,298.80-1,946.76-518.50

Finding the Fourth Proportional to 1,298.80, 1,946.76 and 518.50

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Solution

The fourth proportional to 1,298.80, 1,946.76 and 518.50 is: 777.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.80 : 1,946.76 = 518.50 : x
  2. Step 2: Convert to fraction form
    1,298.80/1,946.76 = 518.50/x
  3. Step 3: Cross multiply
    1,298.80x = 1,946.76 × 518.50
  4. Step 4: Simplify right side
    1,298.80x = 1,009,395.06
  5. Step 5: Solve for x
    x = 1,009,395.06/1,298.80
  6. Step 6: Final answer
    x = 777.18

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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.