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Finding the Fourth Proportional to 1,712.12, 2,569.79 and 890.98

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Solution

The fourth proportional to 1,712.12, 2,569.79 and 890.98 is: 1,337.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,712.12 : 2,569.79 = 890.98 : x
  2. Step 2: Convert to fraction form
    1,712.12/2,569.79 = 890.98/x
  3. Step 3: Cross multiply
    1,712.12x = 2,569.79 × 890.98
  4. Step 4: Simplify right side
    1,712.12x = 2,289,614.19
  5. Step 5: Solve for x
    x = 2,289,614.19/1,712.12
  6. Step 6: Final answer
    x = 1,337.30

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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.