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Finding the Fourth Proportional to 757.20, 1,045.56 and 536.40

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Solution

The fourth proportional to 757.20, 1,045.56 and 536.40 is: 740.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    757.20 : 1,045.56 = 536.40 : x
  2. Step 2: Convert to fraction form
    757.20/1,045.56 = 536.40/x
  3. Step 3: Cross multiply
    757.20x = 1,045.56 × 536.40
  4. Step 4: Simplify right side
    757.20x = 560,838.38
  5. Step 5: Solve for x
    x = 560,838.38/757.20
  6. Step 6: Final answer
    x = 740.67

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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.