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Finding the Fourth Proportional to 607.40, 838.38 and 358.72

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Solution

The fourth proportional to 607.40, 838.38 and 358.72 is: 495.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.40 : 838.38 = 358.72 : x
  2. Step 2: Convert to fraction form
    607.40/838.38 = 358.72/x
  3. Step 3: Cross multiply
    607.40x = 838.38 × 358.72
  4. Step 4: Simplify right side
    607.40x = 300,743.67
  5. Step 5: Solve for x
    x = 300,743.67/607.40
  6. Step 6: Final answer
    x = 495.13

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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.