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Finding the Fourth Proportional to 933.60, 1,289.52 and 903.36

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Solution

The fourth proportional to 933.60, 1,289.52 and 903.36 is: 1,247.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.60 : 1,289.52 = 903.36 : x
  2. Step 2: Convert to fraction form
    933.60/1,289.52 = 903.36/x
  3. Step 3: Cross multiply
    933.60x = 1,289.52 × 903.36
  4. Step 4: Simplify right side
    933.60x = 1,164,900.79
  5. Step 5: Solve for x
    x = 1,164,900.79/933.60
  6. Step 6: Final answer
    x = 1,247.75

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1.5x scale

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.