Home / 640,419.52-960,684-191,111.44

Finding the Fourth Proportional to 640,419.52, 960,684 and 191,111.44

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Solution

The fourth proportional to 640,419.52, 960,684 and 191,111.44 is: 286,683.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,419.52 : 960,684 = 191,111.44 : x
  2. Step 2: Convert to fraction form
    640,419.52/960,684 = 191,111.44/x
  3. Step 3: Cross multiply
    640,419.52x = 960,684 × 191,111.44
  4. Step 4: Simplify right side
    640,419.52x = 183,597,702,624.96
  5. Step 5: Solve for x
    x = 183,597,702,624.96/640,419.52
  6. Step 6: Final answer
    x = 286,683.49

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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.