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Finding the Fourth Proportional to 450,368.94, 621,412.11 and 287,087.82

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Solution

The fourth proportional to 450,368.94, 621,412.11 and 287,087.82 is: 396,119.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    450,368.94 : 621,412.11 = 287,087.82 : x
  2. Step 2: Convert to fraction form
    450,368.94/621,412.11 = 287,087.82/x
  3. Step 3: Cross multiply
    450,368.94x = 621,412.11 × 287,087.82
  4. Step 4: Simplify right side
    450,368.94x = 178,399,847,981.50
  5. Step 5: Solve for x
    x = 178,399,847,981.50/450,368.94
  6. Step 6: Final answer
    x = 396,119.34

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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.