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Finding the Fourth Proportional to 452,730.21, 678,570.39 and 426,486.21

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Solution

The fourth proportional to 452,730.21, 678,570.39 and 426,486.21 is: 639,234.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    452,730.21 : 678,570.39 = 426,486.21 : x
  2. Step 2: Convert to fraction form
    452,730.21/678,570.39 = 426,486.21/x
  3. Step 3: Cross multiply
    452,730.21x = 678,570.39 × 426,486.21
  4. Step 4: Simplify right side
    452,730.21x = 289,400,913,849.32
  5. Step 5: Solve for x
    x = 289,400,913,849.32/452,730.21
  6. Step 6: Final answer
    x = 639,234.82

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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.