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Finding the Fourth Proportional to 493,302.20, 739,953.30 and 392,918.90

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Solution

The fourth proportional to 493,302.20, 739,953.30 and 392,918.90 is: 589,378.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,302.20 : 739,953.30 = 392,918.90 : x
  2. Step 2: Convert to fraction form
    493,302.20/739,953.30 = 392,918.90/x
  3. Step 3: Cross multiply
    493,302.20x = 739,953.30 × 392,918.90
  4. Step 4: Simplify right side
    493,302.20x = 290,741,636,687.37
  5. Step 5: Solve for x
    x = 290,741,636,687.37/493,302.20
  6. Step 6: Final answer
    x = 589,378.35

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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.