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Finding the Fourth Proportional to 1,298.32, 1,955.12 and 935.66

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Solution

The fourth proportional to 1,298.32, 1,955.12 and 935.66 is: 1,409.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.32 : 1,955.12 = 935.66 : x
  2. Step 2: Convert to fraction form
    1,298.32/1,955.12 = 935.66/x
  3. Step 3: Cross multiply
    1,298.32x = 1,955.12 × 935.66
  4. Step 4: Simplify right side
    1,298.32x = 1,829,327.58
  5. Step 5: Solve for x
    x = 1,829,327.58/1,298.32
  6. Step 6: Final answer
    x = 1,409.00

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.