Home / 638,905.20-958,357.80-189,695.40

Finding the Fourth Proportional to 638,905.20, 958,357.80 and 189,695.40

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Solution

The fourth proportional to 638,905.20, 958,357.80 and 189,695.40 is: 284,543.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,905.20 : 958,357.80 = 189,695.40 : x
  2. Step 2: Convert to fraction form
    638,905.20/958,357.80 = 189,695.40/x
  3. Step 3: Cross multiply
    638,905.20x = 958,357.80 × 189,695.40
  4. Step 4: Simplify right side
    638,905.20x = 181,796,066,214.12
  5. Step 5: Solve for x
    x = 181,796,066,214.12/638,905.20
  6. Step 6: Final answer
    x = 284,543.10

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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.