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Finding the Fourth Proportional to 510.51, 765.78 and 186.12

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Solution

The fourth proportional to 510.51, 765.78 and 186.12 is: 279.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.51 : 765.78 = 186.12 : x
  2. Step 2: Convert to fraction form
    510.51/765.78 = 186.12/x
  3. Step 3: Cross multiply
    510.51x = 765.78 × 186.12
  4. Step 4: Simplify right side
    510.51x = 142,526.97
  5. Step 5: Solve for x
    x = 142,526.97/510.51
  6. Step 6: Final answer
    x = 279.19

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1.5x scale

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.