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Finding the Fourth Proportional to 620,689.20, 930,947.40 and 200,007.60

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Solution

The fourth proportional to 620,689.20, 930,947.40 and 200,007.60 is: 299,983.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,689.20 : 930,947.40 = 200,007.60 : x
  2. Step 2: Convert to fraction form
    620,689.20/930,947.40 = 200,007.60/x
  3. Step 3: Cross multiply
    620,689.20x = 930,947.40 × 200,007.60
  4. Step 4: Simplify right side
    620,689.20x = 186,196,555,200.24
  5. Step 5: Solve for x
    x = 186,196,555,200.24/620,689.20
  6. Step 6: Final answer
    x = 299,983.56

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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.