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Finding the Fourth Proportional to 619.79, 854.98 and 472.16

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Solution

The fourth proportional to 619.79, 854.98 and 472.16 is: 651.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.79 : 854.98 = 472.16 : x
  2. Step 2: Convert to fraction form
    619.79/854.98 = 472.16/x
  3. Step 3: Cross multiply
    619.79x = 854.98 × 472.16
  4. Step 4: Simplify right side
    619.79x = 403,688.31
  5. Step 5: Solve for x
    x = 403,688.31/619.79
  6. Step 6: Final answer
    x = 651.34

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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.