Home / 1,312.10-1,969.14-790.49

Finding the Fourth Proportional to 1,312.10, 1,969.14 and 790.49

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Solution

The fourth proportional to 1,312.10, 1,969.14 and 790.49 is: 1,186.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.10 : 1,969.14 = 790.49 : x
  2. Step 2: Convert to fraction form
    1,312.10/1,969.14 = 790.49/x
  3. Step 3: Cross multiply
    1,312.10x = 1,969.14 × 790.49
  4. Step 4: Simplify right side
    1,312.10x = 1,556,585.48
  5. Step 5: Solve for x
    x = 1,556,585.48/1,312.10
  6. Step 6: Final answer
    x = 1,186.33

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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.