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Finding the Fourth Proportional to 153.18, 228.42 and 130.50

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Solution

The fourth proportional to 153.18, 228.42 and 130.50 is: 194.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.18 : 228.42 = 130.50 : x
  2. Step 2: Convert to fraction form
    153.18/228.42 = 130.50/x
  3. Step 3: Cross multiply
    153.18x = 228.42 × 130.50
  4. Step 4: Simplify right side
    153.18x = 29,808.81
  5. Step 5: Solve for x
    x = 29,808.81/153.18
  6. Step 6: Final answer
    x = 194.60

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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.