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Finding the Fourth Proportional to 858.43, 1,287.10 and 565.62

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Solution

The fourth proportional to 858.43, 1,287.10 and 565.62 is: 848.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.43 : 1,287.10 = 565.62 : x
  2. Step 2: Convert to fraction form
    858.43/1,287.10 = 565.62/x
  3. Step 3: Cross multiply
    858.43x = 1,287.10 × 565.62
  4. Step 4: Simplify right side
    858.43x = 728,009.50
  5. Step 5: Solve for x
    x = 728,009.50/858.43
  6. Step 6: Final answer
    x = 848.07

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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.