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Finding the Fourth Proportional to 666,420.43, 918,703.67 and 475,101.67

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Solution

The fourth proportional to 666,420.43, 918,703.67 and 475,101.67 is: 654,958.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,420.43 : 918,703.67 = 475,101.67 : x
  2. Step 2: Convert to fraction form
    666,420.43/918,703.67 = 475,101.67/x
  3. Step 3: Cross multiply
    666,420.43x = 918,703.67 × 475,101.67
  4. Step 4: Simplify right side
    666,420.43x = 436,477,649,039.88
  5. Step 5: Solve for x
    x = 436,477,649,039.88/666,420.43
  6. Step 6: Final answer
    x = 654,958.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.