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Finding the Fourth Proportional to 58.69, 80.51 and 58.15

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Solution

The fourth proportional to 58.69, 80.51 and 58.15 is: 79.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.69 : 80.51 = 58.15 : x
  2. Step 2: Convert to fraction form
    58.69/80.51 = 58.15/x
  3. Step 3: Cross multiply
    58.69x = 80.51 × 58.15
  4. Step 4: Simplify right side
    58.69x = 4,681.79
  5. Step 5: Solve for x
    x = 4,681.79/58.69
  6. Step 6: Final answer
    x = 79.77

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.