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Finding the Fourth Proportional to 40.70, 56.16 and 23.45

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Solution

The fourth proportional to 40.70, 56.16 and 23.45 is: 32.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.70 : 56.16 = 23.45 : x
  2. Step 2: Convert to fraction form
    40.70/56.16 = 23.45/x
  3. Step 3: Cross multiply
    40.70x = 56.16 × 23.45
  4. Step 4: Simplify right side
    40.70x = 1,316.67
  5. Step 5: Solve for x
    x = 1,316.67/40.70
  6. Step 6: Final answer
    x = 32.35

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Find fourth proportional to 20.35, 28.08 and 11.72
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.