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Finding the Fourth Proportional to 492,780.30, 739,170.45 and 405,300.30

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Solution

The fourth proportional to 492,780.30, 739,170.45 and 405,300.30 is: 607,950.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,780.30 : 739,170.45 = 405,300.30 : x
  2. Step 2: Convert to fraction form
    492,780.30/739,170.45 = 405,300.30/x
  3. Step 3: Cross multiply
    492,780.30x = 739,170.45 × 405,300.30
  4. Step 4: Simplify right side
    492,780.30x = 299,586,005,136.14
  5. Step 5: Solve for x
    x = 299,586,005,136.14/492,780.30
  6. Step 6: Final answer
    x = 607,950.45

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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.