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Finding the Fourth Proportional to 1,047.75, 1,445.54 and 753.45

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Solution

The fourth proportional to 1,047.75, 1,445.54 and 753.45 is: 1,039.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,047.75 : 1,445.54 = 753.45 : x
  2. Step 2: Convert to fraction form
    1,047.75/1,445.54 = 753.45/x
  3. Step 3: Cross multiply
    1,047.75x = 1,445.54 × 753.45
  4. Step 4: Simplify right side
    1,047.75x = 1,089,138.35
  5. Step 5: Solve for x
    x = 1,089,138.35/1,047.75
  6. Step 6: Final answer
    x = 1,039.50

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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.