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Finding the Fourth Proportional to 620,811.30, 931,476.15 and 200,216.10

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Solution

The fourth proportional to 620,811.30, 931,476.15 and 200,216.10 is: 300,407.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,811.30 : 931,476.15 = 200,216.10 : x
  2. Step 2: Convert to fraction form
    620,811.30/931,476.15 = 200,216.10/x
  3. Step 3: Cross multiply
    620,811.30x = 931,476.15 × 200,216.10
  4. Step 4: Simplify right side
    620,811.30x = 186,496,521,996.02
  5. Step 5: Solve for x
    x = 186,496,521,996.02/620,811.30
  6. Step 6: Final answer
    x = 300,407.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.