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Finding the Fourth Proportional to 929.79, 1,393.98 and 564.48

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Solution

The fourth proportional to 929.79, 1,393.98 and 564.48 is: 846.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.79 : 1,393.98 = 564.48 : x
  2. Step 2: Convert to fraction form
    929.79/1,393.98 = 564.48/x
  3. Step 3: Cross multiply
    929.79x = 1,393.98 × 564.48
  4. Step 4: Simplify right side
    929.79x = 786,873.83
  5. Step 5: Solve for x
    x = 786,873.83/929.79
  6. Step 6: Final answer
    x = 846.29

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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.