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Finding the Fourth Proportional to 673.46, 929.39 and 378.76

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Solution

The fourth proportional to 673.46, 929.39 and 378.76 is: 522.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.46 : 929.39 = 378.76 : x
  2. Step 2: Convert to fraction form
    673.46/929.39 = 378.76/x
  3. Step 3: Cross multiply
    673.46x = 929.39 × 378.76
  4. Step 4: Simplify right side
    673.46x = 352,015.76
  5. Step 5: Solve for x
    x = 352,015.76/673.46
  6. Step 6: Final answer
    x = 522.70

Related Problems

Find fourth proportional to 336.73, 464.70 and 189.38
Half scale
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Double scale
Find fourth proportional to 674.46, 930.77 and 379.76
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.