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Finding the Fourth Proportional to 493,487.10, 740,230.65 and 422,628.30

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Solution

The fourth proportional to 493,487.10, 740,230.65 and 422,628.30 is: 633,942.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,487.10 : 740,230.65 = 422,628.30 : x
  2. Step 2: Convert to fraction form
    493,487.10/740,230.65 = 422,628.30/x
  3. Step 3: Cross multiply
    493,487.10x = 740,230.65 × 422,628.30
  4. Step 4: Simplify right side
    493,487.10x = 312,842,421,217.40
  5. Step 5: Solve for x
    x = 312,842,421,217.40/493,487.10
  6. Step 6: Final answer
    x = 633,942.45

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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.