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Finding the Fourth Proportional to 1,055.34, 1,455.57 and 662.22

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Solution

The fourth proportional to 1,055.34, 1,455.57 and 662.22 is: 913.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,055.34 : 1,455.57 = 662.22 : x
  2. Step 2: Convert to fraction form
    1,055.34/1,455.57 = 662.22/x
  3. Step 3: Cross multiply
    1,055.34x = 1,455.57 × 662.22
  4. Step 4: Simplify right side
    1,055.34x = 963,907.57
  5. Step 5: Solve for x
    x = 963,907.57/1,055.34
  6. Step 6: Final answer
    x = 913.36

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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.