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Finding the Fourth Proportional to 665,041.20, 997,561.80 and 310,091.10

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Solution

The fourth proportional to 665,041.20, 997,561.80 and 310,091.10 is: 465,136.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,041.20 : 997,561.80 = 310,091.10 : x
  2. Step 2: Convert to fraction form
    665,041.20/997,561.80 = 310,091.10/x
  3. Step 3: Cross multiply
    665,041.20x = 997,561.80 × 310,091.10
  4. Step 4: Simplify right side
    665,041.20x = 309,335,035,879.98
  5. Step 5: Solve for x
    x = 309,335,035,879.98/665,041.20
  6. Step 6: Final answer
    x = 465,136.65

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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.