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Finding the Fourth Proportional to 1,328.94, 1,835.19 and 864.06

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Solution

The fourth proportional to 1,328.94, 1,835.19 and 864.06 is: 1,193.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.94 : 1,835.19 = 864.06 : x
  2. Step 2: Convert to fraction form
    1,328.94/1,835.19 = 864.06/x
  3. Step 3: Cross multiply
    1,328.94x = 1,835.19 × 864.06
  4. Step 4: Simplify right side
    1,328.94x = 1,585,714.27
  5. Step 5: Solve for x
    x = 1,585,714.27/1,328.94
  6. Step 6: Final answer
    x = 1,193.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.