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Finding the Fourth Proportional to 389,284.80, 537,212.80 and 210,436.80

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Solution

The fourth proportional to 389,284.80, 537,212.80 and 210,436.80 is: 290,402.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,284.80 : 537,212.80 = 210,436.80 : x
  2. Step 2: Convert to fraction form
    389,284.80/537,212.80 = 210,436.80/x
  3. Step 3: Cross multiply
    389,284.80x = 537,212.80 × 210,436.80
  4. Step 4: Simplify right side
    389,284.80x = 113,049,342,551.04
  5. Step 5: Solve for x
    x = 113,049,342,551.04/389,284.80
  6. Step 6: Final answer
    x = 290,402.66

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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.