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Finding the Fourth Proportional to 389,416.23, 537,419.48 and 219,646.71

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Solution

The fourth proportional to 389,416.23, 537,419.48 and 219,646.71 is: 303,126.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,416.23 : 537,419.48 = 219,646.71 : x
  2. Step 2: Convert to fraction form
    389,416.23/537,419.48 = 219,646.71/x
  3. Step 3: Cross multiply
    389,416.23x = 537,419.48 × 219,646.71
  4. Step 4: Simplify right side
    389,416.23x = 118,042,419,573.68
  5. Step 5: Solve for x
    x = 118,042,419,573.68/389,416.23
  6. Step 6: Final answer
    x = 303,126.60

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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.