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Finding the Fourth Proportional to 1,356.79, 2,035.29 and 432.31

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Solution

The fourth proportional to 1,356.79, 2,035.29 and 432.31 is: 648.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.79 : 2,035.29 = 432.31 : x
  2. Step 2: Convert to fraction form
    1,356.79/2,035.29 = 432.31/x
  3. Step 3: Cross multiply
    1,356.79x = 2,035.29 × 432.31
  4. Step 4: Simplify right side
    1,356.79x = 879,876.22
  5. Step 5: Solve for x
    x = 879,876.22/1,356.79
  6. Step 6: Final answer
    x = 648.50

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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.