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Finding the Fourth Proportional to 1,357.60, 2,035.88 and 432.96

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Solution

The fourth proportional to 1,357.60, 2,035.88 and 432.96 is: 649.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,357.60 : 2,035.88 = 432.96 : x
  2. Step 2: Convert to fraction form
    1,357.60/2,035.88 = 432.96/x
  3. Step 3: Cross multiply
    1,357.60x = 2,035.88 × 432.96
  4. Step 4: Simplify right side
    1,357.60x = 881,454.60
  5. Step 5: Solve for x
    x = 881,454.60/1,357.60
  6. Step 6: Final answer
    x = 649.27

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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.