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Finding the Fourth Proportional to 770.45, 1,060.76 and 672.17

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Solution

The fourth proportional to 770.45, 1,060.76 and 672.17 is: 925.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    770.45 : 1,060.76 = 672.17 : x
  2. Step 2: Convert to fraction form
    770.45/1,060.76 = 672.17/x
  3. Step 3: Cross multiply
    770.45x = 1,060.76 × 672.17
  4. Step 4: Simplify right side
    770.45x = 713,002.38
  5. Step 5: Solve for x
    x = 713,002.38/770.45
  6. Step 6: Final answer
    x = 925.44

Related Problems

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Half scale
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Double scale
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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.