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Finding the Fourth Proportional to 1,728.05, 2,590.53 and 753.62

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Solution

The fourth proportional to 1,728.05, 2,590.53 and 753.62 is: 1,129.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,728.05 : 2,590.53 = 753.62 : x
  2. Step 2: Convert to fraction form
    1,728.05/2,590.53 = 753.62/x
  3. Step 3: Cross multiply
    1,728.05x = 2,590.53 × 753.62
  4. Step 4: Simplify right side
    1,728.05x = 1,952,275.22
  5. Step 5: Solve for x
    x = 1,952,275.22/1,728.05
  6. Step 6: Final answer
    x = 1,129.76

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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.