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Finding the Fourth Proportional to 356.16, 530.30 and 355.08

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Solution

The fourth proportional to 356.16, 530.30 and 355.08 is: 528.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.16 : 530.30 = 355.08 : x
  2. Step 2: Convert to fraction form
    356.16/530.30 = 355.08/x
  3. Step 3: Cross multiply
    356.16x = 530.30 × 355.08
  4. Step 4: Simplify right side
    356.16x = 188,297.15
  5. Step 5: Solve for x
    x = 188,297.15/356.16
  6. Step 6: Final answer
    x = 528.69

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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.