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Finding the Fourth Proportional to 665,047.80, 997,571.70 and 384,420.60

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Solution

The fourth proportional to 665,047.80, 997,571.70 and 384,420.60 is: 576,630.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,047.80 : 997,571.70 = 384,420.60 : x
  2. Step 2: Convert to fraction form
    665,047.80/997,571.70 = 384,420.60/x
  3. Step 3: Cross multiply
    665,047.80x = 997,571.70 × 384,420.60
  4. Step 4: Simplify right side
    665,047.80x = 383,487,111,457.02
  5. Step 5: Solve for x
    x = 383,487,111,457.02/665,047.80
  6. Step 6: Final answer
    x = 576,630.90

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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.