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Finding the Fourth Proportional to 953.75, 1,316.34 and 555.45

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Solution

The fourth proportional to 953.75, 1,316.34 and 555.45 is: 766.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.75 : 1,316.34 = 555.45 : x
  2. Step 2: Convert to fraction form
    953.75/1,316.34 = 555.45/x
  3. Step 3: Cross multiply
    953.75x = 1,316.34 × 555.45
  4. Step 4: Simplify right side
    953.75x = 731,161.05
  5. Step 5: Solve for x
    x = 731,161.05/953.75
  6. Step 6: Final answer
    x = 766.62

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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.