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Finding the Fourth Proportional to 440.19, 607.43 and 274.40

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Solution

The fourth proportional to 440.19, 607.43 and 274.40 is: 378.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.19 : 607.43 = 274.40 : x
  2. Step 2: Convert to fraction form
    440.19/607.43 = 274.40/x
  3. Step 3: Cross multiply
    440.19x = 607.43 × 274.40
  4. Step 4: Simplify right side
    440.19x = 166,678.79
  5. Step 5: Solve for x
    x = 166,678.79/440.19
  6. Step 6: Final answer
    x = 378.65

Related Problems

Find fourth proportional to 220.10, 303.72 and 137.20
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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.