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Finding the Fourth Proportional to 1,582, 2,182.40 and 1,230.32

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Solution

The fourth proportional to 1,582, 2,182.40 and 1,230.32 is: 1,697.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,582 : 2,182.40 = 1,230.32 : x
  2. Step 2: Convert to fraction form
    1,582/2,182.40 = 1,230.32/x
  3. Step 3: Cross multiply
    1,582x = 2,182.40 × 1,230.32
  4. Step 4: Simplify right side
    1,582x = 2,685,050.37
  5. Step 5: Solve for x
    x = 2,685,050.37/1,582
  6. Step 6: Final answer
    x = 1,697.25

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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.