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Finding the Fourth Proportional to 569.46, 857.20 and 485.94

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Solution

The fourth proportional to 569.46, 857.20 and 485.94 is: 731.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    569.46 : 857.20 = 485.94 : x
  2. Step 2: Convert to fraction form
    569.46/857.20 = 485.94/x
  3. Step 3: Cross multiply
    569.46x = 857.20 × 485.94
  4. Step 4: Simplify right side
    569.46x = 416,547.77
  5. Step 5: Solve for x
    x = 416,547.77/569.46
  6. Step 6: Final answer
    x = 731.48

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.