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Finding the Fourth Proportional to 321,327.55, 442,920.47 and 253,235.30

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Solution

The fourth proportional to 321,327.55, 442,920.47 and 253,235.30 is: 349,061.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,327.55 : 442,920.47 = 253,235.30 : x
  2. Step 2: Convert to fraction form
    321,327.55/442,920.47 = 253,235.30/x
  3. Step 3: Cross multiply
    321,327.55x = 442,920.47 × 253,235.30
  4. Step 4: Simplify right side
    321,327.55x = 112,163,099,836.98
  5. Step 5: Solve for x
    x = 112,163,099,836.98/321,327.55
  6. Step 6: Final answer
    x = 349,061.58

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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.