Home / 1,312.20-1,968.30-581.58

Finding the Fourth Proportional to 1,312.20, 1,968.30 and 581.58

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Solution

The fourth proportional to 1,312.20, 1,968.30 and 581.58 is: 872.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.20 : 1,968.30 = 581.58 : x
  2. Step 2: Convert to fraction form
    1,312.20/1,968.30 = 581.58/x
  3. Step 3: Cross multiply
    1,312.20x = 1,968.30 × 581.58
  4. Step 4: Simplify right side
    1,312.20x = 1,144,723.91
  5. Step 5: Solve for x
    x = 1,144,723.91/1,312.20
  6. Step 6: Final answer
    x = 872.37

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1.5x scale

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.