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Finding the Fourth Proportional to 551,428.30, 827,142.45 and 411,460.30

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Solution

The fourth proportional to 551,428.30, 827,142.45 and 411,460.30 is: 617,190.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,428.30 : 827,142.45 = 411,460.30 : x
  2. Step 2: Convert to fraction form
    551,428.30/827,142.45 = 411,460.30/x
  3. Step 3: Cross multiply
    551,428.30x = 827,142.45 × 411,460.30
  4. Step 4: Simplify right side
    551,428.30x = 340,336,280,619.74
  5. Step 5: Solve for x
    x = 340,336,280,619.74/551,428.30
  6. Step 6: Final answer
    x = 617,190.45

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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.