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Finding the Fourth Proportional to 536.90, 805.36 and 429.98

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Solution

The fourth proportional to 536.90, 805.36 and 429.98 is: 644.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.90 : 805.36 = 429.98 : x
  2. Step 2: Convert to fraction form
    536.90/805.36 = 429.98/x
  3. Step 3: Cross multiply
    536.90x = 805.36 × 429.98
  4. Step 4: Simplify right side
    536.90x = 346,288.69
  5. Step 5: Solve for x
    x = 346,288.69/536.90
  6. Step 6: Final answer
    x = 644.98

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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.