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Finding the Fourth Proportional to 859.50, 1,186.38 and 510.12

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Solution

The fourth proportional to 859.50, 1,186.38 and 510.12 is: 704.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.50 : 1,186.38 = 510.12 : x
  2. Step 2: Convert to fraction form
    859.50/1,186.38 = 510.12/x
  3. Step 3: Cross multiply
    859.50x = 1,186.38 × 510.12
  4. Step 4: Simplify right side
    859.50x = 605,196.17
  5. Step 5: Solve for x
    x = 605,196.17/859.50
  6. Step 6: Final answer
    x = 704.13

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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.