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Finding the Fourth Proportional to 389,366.25, 537,325.44 and 210,518.25

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Solution

The fourth proportional to 389,366.25, 537,325.44 and 210,518.25 is: 290,515.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,366.25 : 537,325.44 = 210,518.25 : x
  2. Step 2: Convert to fraction form
    389,366.25/537,325.44 = 210,518.25/x
  3. Step 3: Cross multiply
    389,366.25x = 537,325.44 × 210,518.25
  4. Step 4: Simplify right side
    389,366.25x = 113,116,811,309.28
  5. Step 5: Solve for x
    x = 113,116,811,309.28/389,366.25
  6. Step 6: Final answer
    x = 290,515.19

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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.