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Finding the Fourth Proportional to 1,292.76, 1,783.80 and 733.32

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Solution

The fourth proportional to 1,292.76, 1,783.80 and 733.32 is: 1,011.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.76 : 1,783.80 = 733.32 : x
  2. Step 2: Convert to fraction form
    1,292.76/1,783.80 = 733.32/x
  3. Step 3: Cross multiply
    1,292.76x = 1,783.80 × 733.32
  4. Step 4: Simplify right side
    1,292.76x = 1,308,096.22
  5. Step 5: Solve for x
    x = 1,308,096.22/1,292.76
  6. Step 6: Final answer
    x = 1,011.86

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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.