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Finding the Fourth Proportional to 356.77, 530.89 and 355.56

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Solution

The fourth proportional to 356.77, 530.89 and 355.56 is: 529.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.77 : 530.89 = 355.56 : x
  2. Step 2: Convert to fraction form
    356.77/530.89 = 355.56/x
  3. Step 3: Cross multiply
    356.77x = 530.89 × 355.56
  4. Step 4: Simplify right side
    356.77x = 188,760.37
  5. Step 5: Solve for x
    x = 188,760.37/356.77
  6. Step 6: Final answer
    x = 529.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.