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Finding the Fourth Proportional to 473.72, 653.34 and 307.85

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Solution

The fourth proportional to 473.72, 653.34 and 307.85 is: 424.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    473.72 : 653.34 = 307.85 : x
  2. Step 2: Convert to fraction form
    473.72/653.34 = 307.85/x
  3. Step 3: Cross multiply
    473.72x = 653.34 × 307.85
  4. Step 4: Simplify right side
    473.72x = 201,130.72
  5. Step 5: Solve for x
    x = 201,130.72/473.72
  6. Step 6: Final answer
    x = 424.58

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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.