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Finding the Fourth Proportional to 422,790.18, 583,477.47 and 279,298.68

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Solution

The fourth proportional to 422,790.18, 583,477.47 and 279,298.68 is: 385,450.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,790.18 : 583,477.47 = 279,298.68 : x
  2. Step 2: Convert to fraction form
    422,790.18/583,477.47 = 279,298.68/x
  3. Step 3: Cross multiply
    422,790.18x = 583,477.47 × 279,298.68
  4. Step 4: Simplify right side
    422,790.18x = 162,964,487,180.74
  5. Step 5: Solve for x
    x = 162,964,487,180.74/422,790.18
  6. Step 6: Final answer
    x = 385,450.03

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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.