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Finding the Fourth Proportional to 664,999.80, 997,499.70 and 385,063.80

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Solution

The fourth proportional to 664,999.80, 997,499.70 and 385,063.80 is: 577,595.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,999.80 : 997,499.70 = 385,063.80 : x
  2. Step 2: Convert to fraction form
    664,999.80/997,499.70 = 385,063.80/x
  3. Step 3: Cross multiply
    664,999.80x = 997,499.70 × 385,063.80
  4. Step 4: Simplify right side
    664,999.80x = 384,101,024,980.86
  5. Step 5: Solve for x
    x = 384,101,024,980.86/664,999.80
  6. Step 6: Final answer
    x = 577,595.70

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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.