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Finding the Fourth Proportional to 560.82, 841.40 and 445.31

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Solution

The fourth proportional to 560.82, 841.40 and 445.31 is: 668.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.82 : 841.40 = 445.31 : x
  2. Step 2: Convert to fraction form
    560.82/841.40 = 445.31/x
  3. Step 3: Cross multiply
    560.82x = 841.40 × 445.31
  4. Step 4: Simplify right side
    560.82x = 374,683.83
  5. Step 5: Solve for x
    x = 374,683.83/560.82
  6. Step 6: Final answer
    x = 668.10

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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.