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Finding the Fourth Proportional to 355.16, 530.35 and 290.29

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Solution

The fourth proportional to 355.16, 530.35 and 290.29 is: 433.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.16 : 530.35 = 290.29 : x
  2. Step 2: Convert to fraction form
    355.16/530.35 = 290.29/x
  3. Step 3: Cross multiply
    355.16x = 530.35 × 290.29
  4. Step 4: Simplify right side
    355.16x = 153,954.24
  5. Step 5: Solve for x
    x = 153,954.24/355.16
  6. Step 6: Final answer
    x = 433.48

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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.