Home / 1,298.45-1,946.88-517.81

Finding the Fourth Proportional to 1,298.45, 1,946.88 and 517.81

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Solution

The fourth proportional to 1,298.45, 1,946.88 and 517.81 is: 776.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.45 : 1,946.88 = 517.81 : x
  2. Step 2: Convert to fraction form
    1,298.45/1,946.88 = 517.81/x
  3. Step 3: Cross multiply
    1,298.45x = 1,946.88 × 517.81
  4. Step 4: Simplify right side
    1,298.45x = 1,008,113.93
  5. Step 5: Solve for x
    x = 1,008,113.93/1,298.45
  6. Step 6: Final answer
    x = 776.40

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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.