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Finding the Fourth Proportional to 864.79, 1,193.68 and 533.70

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Solution

The fourth proportional to 864.79, 1,193.68 and 533.70 is: 736.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.79 : 1,193.68 = 533.70 : x
  2. Step 2: Convert to fraction form
    864.79/1,193.68 = 533.70/x
  3. Step 3: Cross multiply
    864.79x = 1,193.68 × 533.70
  4. Step 4: Simplify right side
    864.79x = 637,067.02
  5. Step 5: Solve for x
    x = 637,067.02/864.79
  6. Step 6: Final answer
    x = 736.67

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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.