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Finding the Fourth Proportional to 591.49, 816.65 and 358.75

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Solution

The fourth proportional to 591.49, 816.65 and 358.75 is: 495.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.49 : 816.65 = 358.75 : x
  2. Step 2: Convert to fraction form
    591.49/816.65 = 358.75/x
  3. Step 3: Cross multiply
    591.49x = 816.65 × 358.75
  4. Step 4: Simplify right side
    591.49x = 292,973.19
  5. Step 5: Solve for x
    x = 292,973.19/591.49
  6. Step 6: Final answer
    x = 495.31

Related Problems

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Half scale
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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.