Home / 1,312.29-1,968.77-490.56

Finding the Fourth Proportional to 1,312.29, 1,968.77 and 490.56

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Solution

The fourth proportional to 1,312.29, 1,968.77 and 490.56 is: 735.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.29 : 1,968.77 = 490.56 : x
  2. Step 2: Convert to fraction form
    1,312.29/1,968.77 = 490.56/x
  3. Step 3: Cross multiply
    1,312.29x = 1,968.77 × 490.56
  4. Step 4: Simplify right side
    1,312.29x = 965,799.81
  5. Step 5: Solve for x
    x = 965,799.81/1,312.29
  6. Step 6: Final answer
    x = 735.97

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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.