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Finding the Fourth Proportional to 432,442.60, 648,663.90 and 313,556.20

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Solution

The fourth proportional to 432,442.60, 648,663.90 and 313,556.20 is: 470,334.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,442.60 : 648,663.90 = 313,556.20 : x
  2. Step 2: Convert to fraction form
    432,442.60/648,663.90 = 313,556.20/x
  3. Step 3: Cross multiply
    432,442.60x = 648,663.90 × 313,556.20
  4. Step 4: Simplify right side
    432,442.60x = 203,392,587,561.18
  5. Step 5: Solve for x
    x = 203,392,587,561.18/432,442.60
  6. Step 6: Final answer
    x = 470,334.30

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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.