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Finding the Fourth Proportional to 390,711.03, 539,184.44 and 211,863.03

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Solution

The fourth proportional to 390,711.03, 539,184.44 and 211,863.03 is: 292,372.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,711.03 : 539,184.44 = 211,863.03 : x
  2. Step 2: Convert to fraction form
    390,711.03/539,184.44 = 211,863.03/x
  3. Step 3: Cross multiply
    390,711.03x = 539,184.44 × 211,863.03
  4. Step 4: Simplify right side
    390,711.03x = 114,233,248,127.94
  5. Step 5: Solve for x
    x = 114,233,248,127.94/390,711.03
  6. Step 6: Final answer
    x = 292,372.72

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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.