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Finding the Fourth Proportional to 1,553.55, 2,330.28 and 513.60

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Solution

The fourth proportional to 1,553.55, 2,330.28 and 513.60 is: 770.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.55 : 2,330.28 = 513.60 : x
  2. Step 2: Convert to fraction form
    1,553.55/2,330.28 = 513.60/x
  3. Step 3: Cross multiply
    1,553.55x = 2,330.28 × 513.60
  4. Step 4: Simplify right side
    1,553.55x = 1,196,831.81
  5. Step 5: Solve for x
    x = 1,196,831.81/1,553.55
  6. Step 6: Final answer
    x = 770.39

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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.