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Finding the Fourth Proportional to 389,719.17, 537,813.99 and 210,871.17

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Solution

The fourth proportional to 389,719.17, 537,813.99 and 210,871.17 is: 291,003.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,719.17 : 537,813.99 = 210,871.17 : x
  2. Step 2: Convert to fraction form
    389,719.17/537,813.99 = 210,871.17/x
  3. Step 3: Cross multiply
    389,719.17x = 537,813.99 × 210,871.17
  4. Step 4: Simplify right side
    389,719.17x = 113,409,465,313.67
  5. Step 5: Solve for x
    x = 113,409,465,313.67/389,719.17
  6. Step 6: Final answer
    x = 291,003.05

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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.