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Finding the Fourth Proportional to 424.76, 586.28 and 398.94

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Solution

The fourth proportional to 424.76, 586.28 and 398.94 is: 550.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.76 : 586.28 = 398.94 : x
  2. Step 2: Convert to fraction form
    424.76/586.28 = 398.94/x
  3. Step 3: Cross multiply
    424.76x = 586.28 × 398.94
  4. Step 4: Simplify right side
    424.76x = 233,888.55
  5. Step 5: Solve for x
    x = 233,888.55/424.76
  6. Step 6: Final answer
    x = 550.64

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Find fourth proportional to 212.38, 293.14 and 199.47
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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.