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Finding the Fourth Proportional to 368.10, 515.70 and 368.10

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Solution

The fourth proportional to 368.10, 515.70 and 368.10 is: 515.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.10 : 515.70 = 368.10 : x
  2. Step 2: Convert to fraction form
    368.10/515.70 = 368.10/x
  3. Step 3: Cross multiply
    368.10x = 515.70 × 368.10
  4. Step 4: Simplify right side
    368.10x = 189,829.17
  5. Step 5: Solve for x
    x = 189,829.17/368.10
  6. Step 6: Final answer
    x = 515.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.