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Finding the Fourth Proportional to 56.64, 85.35 and 46.72

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Solution

The fourth proportional to 56.64, 85.35 and 46.72 is: 70.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.64 : 85.35 = 46.72 : x
  2. Step 2: Convert to fraction form
    56.64/85.35 = 46.72/x
  3. Step 3: Cross multiply
    56.64x = 85.35 × 46.72
  4. Step 4: Simplify right side
    56.64x = 3,986.89
  5. Step 5: Solve for x
    x = 3,986.89/56.64
  6. Step 6: Final answer
    x = 70.40

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.