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Finding the Fourth Proportional to 930.03, 1,281.87 and 772.16

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Solution

The fourth proportional to 930.03, 1,281.87 and 772.16 is: 1,064.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.03 : 1,281.87 = 772.16 : x
  2. Step 2: Convert to fraction form
    930.03/1,281.87 = 772.16/x
  3. Step 3: Cross multiply
    930.03x = 1,281.87 × 772.16
  4. Step 4: Simplify right side
    930.03x = 989,808.74
  5. Step 5: Solve for x
    x = 989,808.74/930.03
  6. Step 6: Final answer
    x = 1,064.28

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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.