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Finding the Fourth Proportional to 1,664.16, 2,296.51 and 918.15

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Solution

The fourth proportional to 1,664.16, 2,296.51 and 918.15 is: 1,267.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,664.16 : 2,296.51 = 918.15 : x
  2. Step 2: Convert to fraction form
    1,664.16/2,296.51 = 918.15/x
  3. Step 3: Cross multiply
    1,664.16x = 2,296.51 × 918.15
  4. Step 4: Simplify right side
    1,664.16x = 2,108,540.66
  5. Step 5: Solve for x
    x = 2,108,540.66/1,664.16
  6. Step 6: Final answer
    x = 1,267.03

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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.