Home / 1,664.19-2,296.71-918.21

Finding the Fourth Proportional to 1,664.19, 2,296.71 and 918.21

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Solution

The fourth proportional to 1,664.19, 2,296.71 and 918.21 is: 1,267.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,664.19 : 2,296.71 = 918.21 : x
  2. Step 2: Convert to fraction form
    1,664.19/2,296.71 = 918.21/x
  3. Step 3: Cross multiply
    1,664.19x = 2,296.71 × 918.21
  4. Step 4: Simplify right side
    1,664.19x = 2,108,857.50
  5. Step 5: Solve for x
    x = 2,108,857.50/1,664.19
  6. Step 6: Final answer
    x = 1,267.20

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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.