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Finding the Fourth Proportional to 975.40, 1,350.84 and 904.28

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Solution

The fourth proportional to 975.40, 1,350.84 and 904.28 is: 1,252.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.40 : 1,350.84 = 904.28 : x
  2. Step 2: Convert to fraction form
    975.40/1,350.84 = 904.28/x
  3. Step 3: Cross multiply
    975.40x = 1,350.84 × 904.28
  4. Step 4: Simplify right side
    975.40x = 1,221,537.60
  5. Step 5: Solve for x
    x = 1,221,537.60/975.40
  6. Step 6: Final answer
    x = 1,252.35

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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.