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Finding the Fourth Proportional to 665,270.20, 997,905.30 and 310,320.10

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Solution

The fourth proportional to 665,270.20, 997,905.30 and 310,320.10 is: 465,480.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,270.20 : 997,905.30 = 310,320.10 : x
  2. Step 2: Convert to fraction form
    665,270.20/997,905.30 = 310,320.10/x
  3. Step 3: Cross multiply
    665,270.20x = 997,905.30 × 310,320.10
  4. Step 4: Simplify right side
    665,270.20x = 309,670,072,486.53
  5. Step 5: Solve for x
    x = 309,670,072,486.53/665,270.20
  6. Step 6: Final answer
    x = 465,480.15

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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.