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Finding the Fourth Proportional to 528.84, 729.87 and 307.83

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Solution

The fourth proportional to 528.84, 729.87 and 307.83 is: 424.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.84 : 729.87 = 307.83 : x
  2. Step 2: Convert to fraction form
    528.84/729.87 = 307.83/x
  3. Step 3: Cross multiply
    528.84x = 729.87 × 307.83
  4. Step 4: Simplify right side
    528.84x = 224,675.88
  5. Step 5: Solve for x
    x = 224,675.88/528.84
  6. Step 6: Final answer
    x = 424.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.