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Finding the Fourth Proportional to 560.75, 841.64 and 287.03

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Solution

The fourth proportional to 560.75, 841.64 and 287.03 is: 430.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.75 : 841.64 = 287.03 : x
  2. Step 2: Convert to fraction form
    560.75/841.64 = 287.03/x
  3. Step 3: Cross multiply
    560.75x = 841.64 × 287.03
  4. Step 4: Simplify right side
    560.75x = 241,578.75
  5. Step 5: Solve for x
    x = 241,578.75/560.75
  6. Step 6: Final answer
    x = 430.81

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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.