Home / 3,384.60-4,670.70-1,987.40

Finding the Fourth Proportional to 3,384.60, 4,670.70 and 1,987.40

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Solution

The fourth proportional to 3,384.60, 4,670.70 and 1,987.40 is: 2,742.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,384.60 : 4,670.70 = 1,987.40 : x
  2. Step 2: Convert to fraction form
    3,384.60/4,670.70 = 1,987.40/x
  3. Step 3: Cross multiply
    3,384.60x = 4,670.70 × 1,987.40
  4. Step 4: Simplify right side
    3,384.60x = 9,282,549.18
  5. Step 5: Solve for x
    x = 9,282,549.18/3,384.60
  6. Step 6: Final answer
    x = 2,742.58

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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.