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Finding the Fourth Proportional to 1,528.79, 2,293.45 and 663.71

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Solution

The fourth proportional to 1,528.79, 2,293.45 and 663.71 is: 995.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.79 : 2,293.45 = 663.71 : x
  2. Step 2: Convert to fraction form
    1,528.79/2,293.45 = 663.71/x
  3. Step 3: Cross multiply
    1,528.79x = 2,293.45 × 663.71
  4. Step 4: Simplify right side
    1,528.79x = 1,522,172.57
  5. Step 5: Solve for x
    x = 1,522,172.57/1,528.79
  6. Step 6: Final answer
    x = 995.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.