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Finding the Fourth Proportional to 739.42, 1,020.26 and 440.76

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Solution

The fourth proportional to 739.42, 1,020.26 and 440.76 is: 608.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.42 : 1,020.26 = 440.76 : x
  2. Step 2: Convert to fraction form
    739.42/1,020.26 = 440.76/x
  3. Step 3: Cross multiply
    739.42x = 1,020.26 × 440.76
  4. Step 4: Simplify right side
    739.42x = 449,689.80
  5. Step 5: Solve for x
    x = 449,689.80/739.42
  6. Step 6: Final answer
    x = 608.17

Related Problems

Find fourth proportional to 369.71, 510.13 and 220.38
Half scale
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Double scale
Find fourth proportional to 740.42, 1,021.64 and 441.76
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.