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Finding the Fourth Proportional to 5,152.48, 7,728.80 and 1,690.08

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Solution

The fourth proportional to 5,152.48, 7,728.80 and 1,690.08 is: 2,535.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,152.48 : 7,728.80 = 1,690.08 : x
  2. Step 2: Convert to fraction form
    5,152.48/7,728.80 = 1,690.08/x
  3. Step 3: Cross multiply
    5,152.48x = 7,728.80 × 1,690.08
  4. Step 4: Simplify right side
    5,152.48x = 13,062,290.30
  5. Step 5: Solve for x
    x = 13,062,290.30/5,152.48
  6. Step 6: Final answer
    x = 2,535.15

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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.