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Finding the Fourth Proportional to 492,784.30, 739,176.45 and 405,304.30

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Solution

The fourth proportional to 492,784.30, 739,176.45 and 405,304.30 is: 607,956.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,784.30 : 739,176.45 = 405,304.30 : x
  2. Step 2: Convert to fraction form
    492,784.30/739,176.45 = 405,304.30/x
  3. Step 3: Cross multiply
    492,784.30x = 739,176.45 × 405,304.30
  4. Step 4: Simplify right side
    492,784.30x = 299,591,393,643.74
  5. Step 5: Solve for x
    x = 299,591,393,643.74/492,784.30
  6. Step 6: Final answer
    x = 607,956.45

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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.