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Finding the Fourth Proportional to 571.49, 788.69 and 431.36

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Solution

The fourth proportional to 571.49, 788.69 and 431.36 is: 595.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.49 : 788.69 = 431.36 : x
  2. Step 2: Convert to fraction form
    571.49/788.69 = 431.36/x
  3. Step 3: Cross multiply
    571.49x = 788.69 × 431.36
  4. Step 4: Simplify right side
    571.49x = 340,209.32
  5. Step 5: Solve for x
    x = 340,209.32/571.49
  6. Step 6: Final answer
    x = 595.30

Related Problems

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Double scale
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Similar ratio
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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.