Home / 642,345.12-962,795.88-305,109.72

Finding the Fourth Proportional to 642,345.12, 962,795.88 and 305,109.72

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Solution

The fourth proportional to 642,345.12, 962,795.88 and 305,109.72 is: 457,321.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,345.12 : 962,795.88 = 305,109.72 : x
  2. Step 2: Convert to fraction form
    642,345.12/962,795.88 = 305,109.72/x
  3. Step 3: Cross multiply
    642,345.12x = 962,795.88 × 305,109.72
  4. Step 4: Simplify right side
    642,345.12x = 293,758,381,363.95
  5. Step 5: Solve for x
    x = 293,758,381,363.95/642,345.12
  6. Step 6: Final answer
    x = 457,321.73

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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.