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Finding the Fourth Proportional to 670,717.45, 926,420.73 and 486,660.67

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Solution

The fourth proportional to 670,717.45, 926,420.73 and 486,660.67 is: 672,194.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    670,717.45 : 926,420.73 = 486,660.67 : x
  2. Step 2: Convert to fraction form
    670,717.45/926,420.73 = 486,660.67/x
  3. Step 3: Cross multiply
    670,717.45x = 926,420.73 × 486,660.67
  4. Step 4: Simplify right side
    670,717.45x = 450,852,533,163.69
  5. Step 5: Solve for x
    x = 450,852,533,163.69/670,717.45
  6. Step 6: Final answer
    x = 672,194.43

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Double scale
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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.