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Finding the Fourth Proportional to 859.69, 1,186.68 and 510.38

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Solution

The fourth proportional to 859.69, 1,186.68 and 510.38 is: 704.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.69 : 1,186.68 = 510.38 : x
  2. Step 2: Convert to fraction form
    859.69/1,186.68 = 510.38/x
  3. Step 3: Cross multiply
    859.69x = 1,186.68 × 510.38
  4. Step 4: Simplify right side
    859.69x = 605,650.53
  5. Step 5: Solve for x
    x = 605,650.53/859.69
  6. Step 6: Final answer
    x = 704.50

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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.