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Finding the Fourth Proportional to 619.81, 931.10 and 529.60

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Solution

The fourth proportional to 619.81, 931.10 and 529.60 is: 795.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.81 : 931.10 = 529.60 : x
  2. Step 2: Convert to fraction form
    619.81/931.10 = 529.60/x
  3. Step 3: Cross multiply
    619.81x = 931.10 × 529.60
  4. Step 4: Simplify right side
    619.81x = 493,110.56
  5. Step 5: Solve for x
    x = 493,110.56/619.81
  6. Step 6: Final answer
    x = 795.58

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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.