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Finding the Fourth Proportional to 404,857.20, 607,285.80 and 398,952.30

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Solution

The fourth proportional to 404,857.20, 607,285.80 and 398,952.30 is: 598,428.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,857.20 : 607,285.80 = 398,952.30 : x
  2. Step 2: Convert to fraction form
    404,857.20/607,285.80 = 398,952.30/x
  3. Step 3: Cross multiply
    404,857.20x = 607,285.80 × 398,952.30
  4. Step 4: Simplify right side
    404,857.20x = 242,278,066,667.34
  5. Step 5: Solve for x
    x = 242,278,066,667.34/404,857.20
  6. Step 6: Final answer
    x = 598,428.45

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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.