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Finding the Fourth Proportional to 572, 857.55 and 355.28

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Solution

The fourth proportional to 572, 857.55 and 355.28 is: 532.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    572 : 857.55 = 355.28 : x
  2. Step 2: Convert to fraction form
    572/857.55 = 355.28/x
  3. Step 3: Cross multiply
    572x = 857.55 × 355.28
  4. Step 4: Simplify right side
    572x = 304,670.36
  5. Step 5: Solve for x
    x = 304,670.36/572
  6. Step 6: Final answer
    x = 532.64

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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.