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Finding the Fourth Proportional to 659,507.60, 989,261.40 and 423,311.60

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Solution

The fourth proportional to 659,507.60, 989,261.40 and 423,311.60 is: 634,967.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,507.60 : 989,261.40 = 423,311.60 : x
  2. Step 2: Convert to fraction form
    659,507.60/989,261.40 = 423,311.60/x
  3. Step 3: Cross multiply
    659,507.60x = 989,261.40 × 423,311.60
  4. Step 4: Simplify right side
    659,507.60x = 418,765,826,052.24
  5. Step 5: Solve for x
    x = 418,765,826,052.24/659,507.60
  6. Step 6: Final answer
    x = 634,967.40

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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.