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Finding the Fourth Proportional to 765.20, 1,055.97 and 433.62

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Solution

The fourth proportional to 765.20, 1,055.97 and 433.62 is: 598.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    765.20 : 1,055.97 = 433.62 : x
  2. Step 2: Convert to fraction form
    765.20/1,055.97 = 433.62/x
  3. Step 3: Cross multiply
    765.20x = 1,055.97 × 433.62
  4. Step 4: Simplify right side
    765.20x = 457,889.71
  5. Step 5: Solve for x
    x = 457,889.71/765.20
  6. Step 6: Final answer
    x = 598.39

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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.