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Finding the Fourth Proportional to 523,291.20, 784,936.80 and 492,187.20

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Solution

The fourth proportional to 523,291.20, 784,936.80 and 492,187.20 is: 738,280.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    523,291.20 : 784,936.80 = 492,187.20 : x
  2. Step 2: Convert to fraction form
    523,291.20/784,936.80 = 492,187.20/x
  3. Step 3: Cross multiply
    523,291.20x = 784,936.80 × 492,187.20
  4. Step 4: Simplify right side
    523,291.20x = 386,335,845,768.96
  5. Step 5: Solve for x
    x = 386,335,845,768.96/523,291.20
  6. Step 6: Final answer
    x = 738,280.80

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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.