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Finding the Fourth Proportional to 152.64, 228.96 and 56.48

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Solution

The fourth proportional to 152.64, 228.96 and 56.48 is: 84.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    152.64 : 228.96 = 56.48 : x
  2. Step 2: Convert to fraction form
    152.64/228.96 = 56.48/x
  3. Step 3: Cross multiply
    152.64x = 228.96 × 56.48
  4. Step 4: Simplify right side
    152.64x = 12,931.66
  5. Step 5: Solve for x
    x = 12,931.66/152.64
  6. Step 6: Final answer
    x = 84.72

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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.