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Finding the Fourth Proportional to 664,457.40, 996,686.10 and 243,678.60

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Solution

The fourth proportional to 664,457.40, 996,686.10 and 243,678.60 is: 365,517.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,457.40 : 996,686.10 = 243,678.60 : x
  2. Step 2: Convert to fraction form
    664,457.40/996,686.10 = 243,678.60/x
  3. Step 3: Cross multiply
    664,457.40x = 996,686.10 × 243,678.60
  4. Step 4: Simplify right side
    664,457.40x = 242,871,073,487.46
  5. Step 5: Solve for x
    x = 242,871,073,487.46/664,457.40
  6. Step 6: Final answer
    x = 365,517.90

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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.