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Finding the Fourth Proportional to 945.91, 1,303.40 and 933.15

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Solution

The fourth proportional to 945.91, 1,303.40 and 933.15 is: 1,285.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    945.91 : 1,303.40 = 933.15 : x
  2. Step 2: Convert to fraction form
    945.91/1,303.40 = 933.15/x
  3. Step 3: Cross multiply
    945.91x = 1,303.40 × 933.15
  4. Step 4: Simplify right side
    945.91x = 1,216,264.97
  5. Step 5: Solve for x
    x = 1,216,264.97/945.91
  6. Step 6: Final answer
    x = 1,285.82

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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.