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Finding the Fourth Proportional to 666,421.37, 918,704.95 and 475,102.61

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Solution

The fourth proportional to 666,421.37, 918,704.95 and 475,102.61 is: 654,959.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,421.37 : 918,704.95 = 475,102.61 : x
  2. Step 2: Convert to fraction form
    666,421.37/918,704.95 = 475,102.61/x
  3. Step 3: Cross multiply
    666,421.37x = 918,704.95 × 475,102.61
  4. Step 4: Simplify right side
    666,421.37x = 436,479,119,564.92
  5. Step 5: Solve for x
    x = 436,479,119,564.92/666,421.37
  6. Step 6: Final answer
    x = 654,959.67

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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.