Home / 1,106.20-1,526.68-664.21

Finding the Fourth Proportional to 1,106.20, 1,526.68 and 664.21

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Solution

The fourth proportional to 1,106.20, 1,526.68 and 664.21 is: 916.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,106.20 : 1,526.68 = 664.21 : x
  2. Step 2: Convert to fraction form
    1,106.20/1,526.68 = 664.21/x
  3. Step 3: Cross multiply
    1,106.20x = 1,526.68 × 664.21
  4. Step 4: Simplify right side
    1,106.20x = 1,014,036.12
  5. Step 5: Solve for x
    x = 1,014,036.12/1,106.20
  6. Step 6: Final answer
    x = 916.68

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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.