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Finding the Fourth Proportional to 1,087.61, 1,501.07 and 622.01

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Solution

The fourth proportional to 1,087.61, 1,501.07 and 622.01 is: 858.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.61 : 1,501.07 = 622.01 : x
  2. Step 2: Convert to fraction form
    1,087.61/1,501.07 = 622.01/x
  3. Step 3: Cross multiply
    1,087.61x = 1,501.07 × 622.01
  4. Step 4: Simplify right side
    1,087.61x = 933,677.44
  5. Step 5: Solve for x
    x = 933,677.44/1,087.61
  6. Step 6: Final answer
    x = 858.47

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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.