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Finding the Fourth Proportional to 1,374.48, 1,898.28 and 933.12

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Solution

The fourth proportional to 1,374.48, 1,898.28 and 933.12 is: 1,288.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,374.48 : 1,898.28 = 933.12 : x
  2. Step 2: Convert to fraction form
    1,374.48/1,898.28 = 933.12/x
  3. Step 3: Cross multiply
    1,374.48x = 1,898.28 × 933.12
  4. Step 4: Simplify right side
    1,374.48x = 1,771,323.03
  5. Step 5: Solve for x
    x = 1,771,323.03/1,374.48
  6. Step 6: Final answer
    x = 1,288.72

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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.