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Finding the Fourth Proportional to 432,426.60, 648,639.90 and 313,540.20

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Solution

The fourth proportional to 432,426.60, 648,639.90 and 313,540.20 is: 470,310.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,426.60 : 648,639.90 = 313,540.20 : x
  2. Step 2: Convert to fraction form
    432,426.60/648,639.90 = 313,540.20/x
  3. Step 3: Cross multiply
    432,426.60x = 648,639.90 × 313,540.20
  4. Step 4: Simplify right side
    432,426.60x = 203,374,683,973.98
  5. Step 5: Solve for x
    x = 203,374,683,973.98/432,426.60
  6. Step 6: Final answer
    x = 470,310.30

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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.