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Finding the Fourth Proportional to 666,420.37, 918,703.58 and 475,101.61

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Solution

The fourth proportional to 666,420.37, 918,703.58 and 475,101.61 is: 654,958.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,420.37 : 918,703.58 = 475,101.61 : x
  2. Step 2: Convert to fraction form
    666,420.37/918,703.58 = 475,101.61/x
  3. Step 3: Cross multiply
    666,420.37x = 918,703.58 × 475,101.61
  4. Step 4: Simplify right side
    666,420.37x = 436,477,545,298.50
  5. Step 5: Solve for x
    x = 436,477,545,298.50/666,420.37
  6. Step 6: Final answer
    x = 654,958.29

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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.