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Finding the Fourth Proportional to 820.02, 1,130.86 and 633.93

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Solution

The fourth proportional to 820.02, 1,130.86 and 633.93 is: 874.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    820.02 : 1,130.86 = 633.93 : x
  2. Step 2: Convert to fraction form
    820.02/1,130.86 = 633.93/x
  3. Step 3: Cross multiply
    820.02x = 1,130.86 × 633.93
  4. Step 4: Simplify right side
    820.02x = 716,886.08
  5. Step 5: Solve for x
    x = 716,886.08/820.02
  6. Step 6: Final answer
    x = 874.23

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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.