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Finding the Fourth Proportional to 859.64, 1,186.14 and 510.14

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Solution

The fourth proportional to 859.64, 1,186.14 and 510.14 is: 703.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.64 : 1,186.14 = 510.14 : x
  2. Step 2: Convert to fraction form
    859.64/1,186.14 = 510.14/x
  3. Step 3: Cross multiply
    859.64x = 1,186.14 × 510.14
  4. Step 4: Simplify right side
    859.64x = 605,097.46
  5. Step 5: Solve for x
    x = 605,097.46/859.64
  6. Step 6: Final answer
    x = 703.90

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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.