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Finding the Fourth Proportional to 1,624.13, 2,431.80 and 842.50

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Solution

The fourth proportional to 1,624.13, 2,431.80 and 842.50 is: 1,261.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,624.13 : 2,431.80 = 842.50 : x
  2. Step 2: Convert to fraction form
    1,624.13/2,431.80 = 842.50/x
  3. Step 3: Cross multiply
    1,624.13x = 2,431.80 × 842.50
  4. Step 4: Simplify right side
    1,624.13x = 2,048,780.86
  5. Step 5: Solve for x
    x = 2,048,780.86/1,624.13
  6. Step 6: Final answer
    x = 1,261.46

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1.5x scale

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.