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Finding the Fourth Proportional to 659,664.30, 989,496.45 and 379,728.30

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Solution

The fourth proportional to 659,664.30, 989,496.45 and 379,728.30 is: 569,592.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,664.30 : 989,496.45 = 379,728.30 : x
  2. Step 2: Convert to fraction form
    659,664.30/989,496.45 = 379,728.30/x
  3. Step 3: Cross multiply
    659,664.30x = 989,496.45 × 379,728.30
  4. Step 4: Simplify right side
    659,664.30x = 375,739,804,814.54
  5. Step 5: Solve for x
    x = 375,739,804,814.54/659,664.30
  6. Step 6: Final answer
    x = 569,592.45

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Half scale
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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.