Home / 1,312.21-1,802.75-1,174.15

Finding the Fourth Proportional to 1,312.21, 1,802.75 and 1,174.15

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Solution

The fourth proportional to 1,312.21, 1,802.75 and 1,174.15 is: 1,613.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.21 : 1,802.75 = 1,174.15 : x
  2. Step 2: Convert to fraction form
    1,312.21/1,802.75 = 1,174.15/x
  3. Step 3: Cross multiply
    1,312.21x = 1,802.75 × 1,174.15
  4. Step 4: Simplify right side
    1,312.21x = 2,116,698.91
  5. Step 5: Solve for x
    x = 2,116,698.91/1,312.21
  6. Step 6: Final answer
    x = 1,613.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.