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Finding the Fourth Proportional to 1,398.04, 1,927.32 and 957

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Solution

The fourth proportional to 1,398.04, 1,927.32 and 957 is: 1,319.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.04 : 1,927.32 = 957 : x
  2. Step 2: Convert to fraction form
    1,398.04/1,927.32 = 957/x
  3. Step 3: Cross multiply
    1,398.04x = 1,927.32 × 957
  4. Step 4: Simplify right side
    1,398.04x = 1,844,445.24
  5. Step 5: Solve for x
    x = 1,844,445.24/1,398.04
  6. Step 6: Final answer
    x = 1,319.31

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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.