Home / 1,289.80-1,935.18-549.64

Finding the Fourth Proportional to 1,289.80, 1,935.18 and 549.64

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Solution

The fourth proportional to 1,289.80, 1,935.18 and 549.64 is: 824.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.80 : 1,935.18 = 549.64 : x
  2. Step 2: Convert to fraction form
    1,289.80/1,935.18 = 549.64/x
  3. Step 3: Cross multiply
    1,289.80x = 1,935.18 × 549.64
  4. Step 4: Simplify right side
    1,289.80x = 1,063,643.10
  5. Step 5: Solve for x
    x = 1,063,643.10/1,289.80
  6. Step 6: Final answer
    x = 824.66

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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.