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Finding the Fourth Proportional to 818.35, 1,128.06 and 652.30

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Solution

The fourth proportional to 818.35, 1,128.06 and 652.30 is: 899.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.35 : 1,128.06 = 652.30 : x
  2. Step 2: Convert to fraction form
    818.35/1,128.06 = 652.30/x
  3. Step 3: Cross multiply
    818.35x = 1,128.06 × 652.30
  4. Step 4: Simplify right side
    818.35x = 735,830.72
  5. Step 5: Solve for x
    x = 735,830.72/818.35
  6. Step 6: Final answer
    x = 899.17

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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.