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Finding the Fourth Proportional to 389,427.60, 537,400.16 and 219,648.32

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Solution

The fourth proportional to 389,427.60, 537,400.16 and 219,648.32 is: 303,109.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,427.60 : 537,400.16 = 219,648.32 : x
  2. Step 2: Convert to fraction form
    389,427.60/537,400.16 = 219,648.32/x
  3. Step 3: Cross multiply
    389,427.60x = 537,400.16 × 219,648.32
  4. Step 4: Simplify right side
    389,427.60x = 118,039,042,311.73
  5. Step 5: Solve for x
    x = 118,039,042,311.73/389,427.60
  6. Step 6: Final answer
    x = 303,109.08

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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.