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Finding the Fourth Proportional to 1,030.44, 1,421.88 and 657.27

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Solution

The fourth proportional to 1,030.44, 1,421.88 and 657.27 is: 906.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,030.44 : 1,421.88 = 657.27 : x
  2. Step 2: Convert to fraction form
    1,030.44/1,421.88 = 657.27/x
  3. Step 3: Cross multiply
    1,030.44x = 1,421.88 × 657.27
  4. Step 4: Simplify right side
    1,030.44x = 934,559.07
  5. Step 5: Solve for x
    x = 934,559.07/1,030.44
  6. Step 6: Final answer
    x = 906.95

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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.