Home / 3,101.51-4,280.04-1,685.15

Finding the Fourth Proportional to 3,101.51, 4,280.04 and 1,685.15

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Solution

The fourth proportional to 3,101.51, 4,280.04 and 1,685.15 is: 2,325.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,101.51 : 4,280.04 = 1,685.15 : x
  2. Step 2: Convert to fraction form
    3,101.51/4,280.04 = 1,685.15/x
  3. Step 3: Cross multiply
    3,101.51x = 4,280.04 × 1,685.15
  4. Step 4: Simplify right side
    3,101.51x = 7,212,509.41
  5. Step 5: Solve for x
    x = 7,212,509.41/3,101.51
  6. Step 6: Final answer
    x = 2,325.48

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Half scale
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Double scale
Find fourth proportional to 3,102.51, 4,281.42 and 1,686.15
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.