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Finding the Fourth Proportional to 1,106.08, 1,526.20 and 664.08

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Solution

The fourth proportional to 1,106.08, 1,526.20 and 664.08 is: 916.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,106.08 : 1,526.20 = 664.08 : x
  2. Step 2: Convert to fraction form
    1,106.08/1,526.20 = 664.08/x
  3. Step 3: Cross multiply
    1,106.08x = 1,526.20 × 664.08
  4. Step 4: Simplify right side
    1,106.08x = 1,013,518.90
  5. Step 5: Solve for x
    x = 1,013,518.90/1,106.08
  6. Step 6: Final answer
    x = 916.32

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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.