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Finding the Fourth Proportional to 450,498.84, 621,511.56 and 289,331.52

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Solution

The fourth proportional to 450,498.84, 621,511.56 and 289,331.52 is: 399,163.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,498.84 : 621,511.56 = 289,331.52 : x
  2. Step 2: Convert to fraction form
    450,498.84/621,511.56 = 289,331.52/x
  3. Step 3: Cross multiply
    450,498.84x = 621,511.56 × 289,331.52
  4. Step 4: Simplify right side
    450,498.84x = 179,822,884,352.37
  5. Step 5: Solve for x
    x = 179,822,884,352.37/450,498.84
  6. Step 6: Final answer
    x = 399,163.92

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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.