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Finding the Fourth Proportional to 620,428.20, 931,517.10 and 384,232.20

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Solution

The fourth proportional to 620,428.20, 931,517.10 and 384,232.20 is: 576,890.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,428.20 : 931,517.10 = 384,232.20 : x
  2. Step 2: Convert to fraction form
    620,428.20/931,517.10 = 384,232.20/x
  3. Step 3: Cross multiply
    620,428.20x = 931,517.10 × 384,232.20
  4. Step 4: Simplify right side
    620,428.20x = 357,918,864,670.62
  5. Step 5: Solve for x
    x = 357,918,864,670.62/620,428.20
  6. Step 6: Final answer
    x = 576,890.07

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1.5x scale

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.