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Finding the Fourth Proportional to 486,056.70, 729,085.05 and 397,410.30

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Solution

The fourth proportional to 486,056.70, 729,085.05 and 397,410.30 is: 596,115.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,056.70 : 729,085.05 = 397,410.30 : x
  2. Step 2: Convert to fraction form
    486,056.70/729,085.05 = 397,410.30/x
  3. Step 3: Cross multiply
    486,056.70x = 729,085.05 × 397,410.30
  4. Step 4: Simplify right side
    486,056.70x = 289,745,908,446.02
  5. Step 5: Solve for x
    x = 289,745,908,446.02/486,056.70
  6. Step 6: Final answer
    x = 596,115.45

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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.