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Finding the Fourth Proportional to 513.59, 770.40 and 432.81

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Solution

The fourth proportional to 513.59, 770.40 and 432.81 is: 649.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.59 : 770.40 = 432.81 : x
  2. Step 2: Convert to fraction form
    513.59/770.40 = 432.81/x
  3. Step 3: Cross multiply
    513.59x = 770.40 × 432.81
  4. Step 4: Simplify right side
    513.59x = 333,436.82
  5. Step 5: Solve for x
    x = 333,436.82/513.59
  6. Step 6: Final answer
    x = 649.23

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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.