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Finding the Fourth Proportional to 569.79, 785.07 and 445.86

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Solution

The fourth proportional to 569.79, 785.07 and 445.86 is: 614.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.79 : 785.07 = 445.86 : x
  2. Step 2: Convert to fraction form
    569.79/785.07 = 445.86/x
  3. Step 3: Cross multiply
    569.79x = 785.07 × 445.86
  4. Step 4: Simplify right side
    569.79x = 350,031.31
  5. Step 5: Solve for x
    x = 350,031.31/569.79
  6. Step 6: Final answer
    x = 614.32

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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.