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Finding the Fourth Proportional to 665,280.70, 997,921.05 and 310,330.60

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Solution

The fourth proportional to 665,280.70, 997,921.05 and 310,330.60 is: 465,495.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,280.70 : 997,921.05 = 310,330.60 : x
  2. Step 2: Convert to fraction form
    665,280.70/997,921.05 = 310,330.60/x
  3. Step 3: Cross multiply
    665,280.70x = 997,921.05 × 310,330.60
  4. Step 4: Simplify right side
    665,280.70x = 309,685,438,199.13
  5. Step 5: Solve for x
    x = 309,685,438,199.13/665,280.70
  6. Step 6: Final answer
    x = 465,495.90

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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.