Home / 411,904.10-617,856.15-145,964.90

Finding the Fourth Proportional to 411,904.10, 617,856.15 and 145,964.90

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Solution

The fourth proportional to 411,904.10, 617,856.15 and 145,964.90 is: 218,947.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,904.10 : 617,856.15 = 145,964.90 : x
  2. Step 2: Convert to fraction form
    411,904.10/617,856.15 = 145,964.90/x
  3. Step 3: Cross multiply
    411,904.10x = 617,856.15 × 145,964.90
  4. Step 4: Simplify right side
    411,904.10x = 90,185,311,149.14
  5. Step 5: Solve for x
    x = 90,185,311,149.14/411,904.10
  6. Step 6: Final answer
    x = 218,947.35

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Double scale
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Similar ratio
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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.