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Finding the Fourth Proportional to 899.93, 1,343.70 and 763.04

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Solution

The fourth proportional to 899.93, 1,343.70 and 763.04 is: 1,139.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.93 : 1,343.70 = 763.04 : x
  2. Step 2: Convert to fraction form
    899.93/1,343.70 = 763.04/x
  3. Step 3: Cross multiply
    899.93x = 1,343.70 × 763.04
  4. Step 4: Simplify right side
    899.93x = 1,025,300.21
  5. Step 5: Solve for x
    x = 1,025,300.21/899.93
  6. Step 6: Final answer
    x = 1,139.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.