Home / 1,312.80-1,968.16-543.84

Finding the Fourth Proportional to 1,312.80, 1,968.16 and 543.84

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Solution

The fourth proportional to 1,312.80, 1,968.16 and 543.84 is: 815.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.80 : 1,968.16 = 543.84 : x
  2. Step 2: Convert to fraction form
    1,312.80/1,968.16 = 543.84/x
  3. Step 3: Cross multiply
    1,312.80x = 1,968.16 × 543.84
  4. Step 4: Simplify right side
    1,312.80x = 1,070,364.13
  5. Step 5: Solve for x
    x = 1,070,364.13/1,312.80
  6. Step 6: Final answer
    x = 815.33

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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.