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Finding the Fourth Proportional to 432,099.80, 648,149.70 and 405,834.20

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Solution

The fourth proportional to 432,099.80, 648,149.70 and 405,834.20 is: 608,751.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,099.80 : 648,149.70 = 405,834.20 : x
  2. Step 2: Convert to fraction form
    432,099.80/648,149.70 = 405,834.20/x
  3. Step 3: Cross multiply
    432,099.80x = 648,149.70 × 405,834.20
  4. Step 4: Simplify right side
    432,099.80x = 263,041,314,979.74
  5. Step 5: Solve for x
    x = 263,041,314,979.74/432,099.80
  6. Step 6: Final answer
    x = 608,751.30

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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.