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Finding the Fourth Proportional to 659,664.60, 989,496.90 and 620,298.60

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Solution

The fourth proportional to 659,664.60, 989,496.90 and 620,298.60 is: 930,447.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,664.60 : 989,496.90 = 620,298.60 : x
  2. Step 2: Convert to fraction form
    659,664.60/989,496.90 = 620,298.60/x
  3. Step 3: Cross multiply
    659,664.60x = 989,496.90 × 620,298.60
  4. Step 4: Simplify right side
    659,664.60x = 613,783,541,774.34
  5. Step 5: Solve for x
    x = 613,783,541,774.34/659,664.60
  6. Step 6: Final answer
    x = 930,447.90

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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.