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Finding the Fourth Proportional to 432,012.70, 648,019.05 and 412,329.70

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Solution

The fourth proportional to 432,012.70, 648,019.05 and 412,329.70 is: 618,494.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,012.70 : 648,019.05 = 412,329.70 : x
  2. Step 2: Convert to fraction form
    432,012.70/648,019.05 = 412,329.70/x
  3. Step 3: Cross multiply
    432,012.70x = 648,019.05 × 412,329.70
  4. Step 4: Simplify right side
    432,012.70x = 267,197,500,480.79
  5. Step 5: Solve for x
    x = 267,197,500,480.79/432,012.70
  6. Step 6: Final answer
    x = 618,494.55

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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.