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Finding the Fourth Proportional to 46.47, 64.09 and 40.70

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Solution

The fourth proportional to 46.47, 64.09 and 40.70 is: 56.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.47 : 64.09 = 40.70 : x
  2. Step 2: Convert to fraction form
    46.47/64.09 = 40.70/x
  3. Step 3: Cross multiply
    46.47x = 64.09 × 40.70
  4. Step 4: Simplify right side
    46.47x = 2,608.67
  5. Step 5: Solve for x
    x = 2,608.67/46.47
  6. Step 6: Final answer
    x = 56.13

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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.