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Finding the Fourth Proportional to 423.39, 583.43 and 403.23

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Solution

The fourth proportional to 423.39, 583.43 and 403.23 is: 555.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.39 : 583.43 = 403.23 : x
  2. Step 2: Convert to fraction form
    423.39/583.43 = 403.23/x
  3. Step 3: Cross multiply
    423.39x = 583.43 × 403.23
  4. Step 4: Simplify right side
    423.39x = 235,254.50
  5. Step 5: Solve for x
    x = 235,254.50/423.39
  6. Step 6: Final answer
    x = 555.65

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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.