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Finding the Fourth Proportional to 859.92, 1,186.92 and 510.64

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Solution

The fourth proportional to 859.92, 1,186.92 and 510.64 is: 704.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.92 : 1,186.92 = 510.64 : x
  2. Step 2: Convert to fraction form
    859.92/1,186.92 = 510.64/x
  3. Step 3: Cross multiply
    859.92x = 1,186.92 × 510.64
  4. Step 4: Simplify right side
    859.92x = 606,088.83
  5. Step 5: Solve for x
    x = 606,088.83/859.92
  6. Step 6: Final answer
    x = 704.82

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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.