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Finding the Fourth Proportional to 1,577.34, 2,365.92 and 423

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Solution

The fourth proportional to 1,577.34, 2,365.92 and 423 is: 634.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,577.34 : 2,365.92 = 423 : x
  2. Step 2: Convert to fraction form
    1,577.34/2,365.92 = 423/x
  3. Step 3: Cross multiply
    1,577.34x = 2,365.92 × 423
  4. Step 4: Simplify right side
    1,577.34x = 1,000,784.16
  5. Step 5: Solve for x
    x = 1,000,784.16/1,577.34
  6. Step 6: Final answer
    x = 634.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.