Home / 1,316.80-1,975.20-547.30

Finding the Fourth Proportional to 1,316.80, 1,975.20 and 547.30

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Solution

The fourth proportional to 1,316.80, 1,975.20 and 547.30 is: 820.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.80 : 1,975.20 = 547.30 : x
  2. Step 2: Convert to fraction form
    1,316.80/1,975.20 = 547.30/x
  3. Step 3: Cross multiply
    1,316.80x = 1,975.20 × 547.30
  4. Step 4: Simplify right side
    1,316.80x = 1,081,026.96
  5. Step 5: Solve for x
    x = 1,081,026.96/1,316.80
  6. Step 6: Final answer
    x = 820.95

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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.