Home / 4,987.35-7,480.47-1,289.60

Finding the Fourth Proportional to 4,987.35, 7,480.47 and 1,289.60

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Solution

The fourth proportional to 4,987.35, 7,480.47 and 1,289.60 is: 1,934.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,987.35 : 7,480.47 = 1,289.60 : x
  2. Step 2: Convert to fraction form
    4,987.35/7,480.47 = 1,289.60/x
  3. Step 3: Cross multiply
    4,987.35x = 7,480.47 × 1,289.60
  4. Step 4: Simplify right side
    4,987.35x = 9,646,814.11
  5. Step 5: Solve for x
    x = 9,646,814.11/4,987.35
  6. Step 6: Final answer
    x = 1,934.26

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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.