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Finding the Fourth Proportional to 930.63, 1,283.85 and 707.16

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Solution

The fourth proportional to 930.63, 1,283.85 and 707.16 is: 975.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.63 : 1,283.85 = 707.16 : x
  2. Step 2: Convert to fraction form
    930.63/1,283.85 = 707.16/x
  3. Step 3: Cross multiply
    930.63x = 1,283.85 × 707.16
  4. Step 4: Simplify right side
    930.63x = 907,887.37
  5. Step 5: Solve for x
    x = 907,887.37/930.63
  6. Step 6: Final answer
    x = 975.56

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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.