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Finding the Fourth Proportional to 624.94, 862.70 and 403.85

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Solution

The fourth proportional to 624.94, 862.70 and 403.85 is: 557.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.94 : 862.70 = 403.85 : x
  2. Step 2: Convert to fraction form
    624.94/862.70 = 403.85/x
  3. Step 3: Cross multiply
    624.94x = 862.70 × 403.85
  4. Step 4: Simplify right side
    624.94x = 348,401.40
  5. Step 5: Solve for x
    x = 348,401.40/624.94
  6. Step 6: Final answer
    x = 557.50

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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.