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Finding the Fourth Proportional to 431.08, 595.08 and 300.76

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Solution

The fourth proportional to 431.08, 595.08 and 300.76 is: 415.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.08 : 595.08 = 300.76 : x
  2. Step 2: Convert to fraction form
    431.08/595.08 = 300.76/x
  3. Step 3: Cross multiply
    431.08x = 595.08 × 300.76
  4. Step 4: Simplify right side
    431.08x = 178,976.26
  5. Step 5: Solve for x
    x = 178,976.26/431.08
  6. Step 6: Final answer
    x = 415.18

Related Problems

Find fourth proportional to 215.54, 297.54 and 150.38
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.