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Finding the Fourth Proportional to 156.64, 233.28 and 153.60

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Solution

The fourth proportional to 156.64, 233.28 and 153.60 is: 228.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.64 : 233.28 = 153.60 : x
  2. Step 2: Convert to fraction form
    156.64/233.28 = 153.60/x
  3. Step 3: Cross multiply
    156.64x = 233.28 × 153.60
  4. Step 4: Simplify right side
    156.64x = 35,831.81
  5. Step 5: Solve for x
    x = 35,831.81/156.64
  6. Step 6: Final answer
    x = 228.75

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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.