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Finding the Fourth Proportional to 659.98, 910.20 and 463.42

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Solution

The fourth proportional to 659.98, 910.20 and 463.42 is: 639.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.98 : 910.20 = 463.42 : x
  2. Step 2: Convert to fraction form
    659.98/910.20 = 463.42/x
  3. Step 3: Cross multiply
    659.98x = 910.20 × 463.42
  4. Step 4: Simplify right side
    659.98x = 421,804.88
  5. Step 5: Solve for x
    x = 421,804.88/659.98
  6. Step 6: Final answer
    x = 639.12

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.