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Finding the Fourth Proportional to 1,070.56, 1,477.11 and 622.45

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Solution

The fourth proportional to 1,070.56, 1,477.11 and 622.45 is: 858.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,070.56 : 1,477.11 = 622.45 : x
  2. Step 2: Convert to fraction form
    1,070.56/1,477.11 = 622.45/x
  3. Step 3: Cross multiply
    1,070.56x = 1,477.11 × 622.45
  4. Step 4: Simplify right side
    1,070.56x = 919,427.12
  5. Step 5: Solve for x
    x = 919,427.12/1,070.56
  6. Step 6: Final answer
    x = 858.83

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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.