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Finding the Fourth Proportional to 953.98, 1,316.45 and 555.61

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Solution

The fourth proportional to 953.98, 1,316.45 and 555.61 is: 766.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.98 : 1,316.45 = 555.61 : x
  2. Step 2: Convert to fraction form
    953.98/1,316.45 = 555.61/x
  3. Step 3: Cross multiply
    953.98x = 1,316.45 × 555.61
  4. Step 4: Simplify right side
    953.98x = 731,433.35
  5. Step 5: Solve for x
    x = 731,433.35/953.98
  6. Step 6: Final answer
    x = 766.72

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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.