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Finding the Fourth Proportional to 899.28, 1,347.02 and 412.74

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Solution

The fourth proportional to 899.28, 1,347.02 and 412.74 is: 618.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.28 : 1,347.02 = 412.74 : x
  2. Step 2: Convert to fraction form
    899.28/1,347.02 = 412.74/x
  3. Step 3: Cross multiply
    899.28x = 1,347.02 × 412.74
  4. Step 4: Simplify right side
    899.28x = 555,969.03
  5. Step 5: Solve for x
    x = 555,969.03/899.28
  6. Step 6: Final answer
    x = 618.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.