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Finding the Fourth Proportional to 423.01, 583.35 and 283.15

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Solution

The fourth proportional to 423.01, 583.35 and 283.15 is: 390.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.01 : 583.35 = 283.15 : x
  2. Step 2: Convert to fraction form
    423.01/583.35 = 283.15/x
  3. Step 3: Cross multiply
    423.01x = 583.35 × 283.15
  4. Step 4: Simplify right side
    423.01x = 165,175.55
  5. Step 5: Solve for x
    x = 165,175.55/423.01
  6. Step 6: Final answer
    x = 390.48

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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.