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Finding the Fourth Proportional to 734.76, 1,013.55 and 439.86

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Solution

The fourth proportional to 734.76, 1,013.55 and 439.86 is: 606.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.76 : 1,013.55 = 439.86 : x
  2. Step 2: Convert to fraction form
    734.76/1,013.55 = 439.86/x
  3. Step 3: Cross multiply
    734.76x = 1,013.55 × 439.86
  4. Step 4: Simplify right side
    734.76x = 445,820.10
  5. Step 5: Solve for x
    x = 445,820.10/734.76
  6. Step 6: Final answer
    x = 606.76

Related Problems

Find fourth proportional to 367.38, 506.78 and 219.93
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.