Home / 5,120.25-7,681.59-1,657.50

Finding the Fourth Proportional to 5,120.25, 7,681.59 and 1,657.50

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Solution

The fourth proportional to 5,120.25, 7,681.59 and 1,657.50 is: 2,486.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.25 : 7,681.59 = 1,657.50 : x
  2. Step 2: Convert to fraction form
    5,120.25/7,681.59 = 1,657.50/x
  3. Step 3: Cross multiply
    5,120.25x = 7,681.59 × 1,657.50
  4. Step 4: Simplify right side
    5,120.25x = 12,732,235.43
  5. Step 5: Solve for x
    x = 12,732,235.43/5,120.25
  6. Step 6: Final answer
    x = 2,486.64

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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.