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Finding the Fourth Proportional to 620,143.20, 930,301.20 and 265,154.40

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Solution

The fourth proportional to 620,143.20, 930,301.20 and 265,154.40 is: 397,768.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,143.20 : 930,301.20 = 265,154.40 : x
  2. Step 2: Convert to fraction form
    620,143.20/930,301.20 = 265,154.40/x
  3. Step 3: Cross multiply
    620,143.20x = 930,301.20 × 265,154.40
  4. Step 4: Simplify right side
    620,143.20x = 246,673,456,505.28
  5. Step 5: Solve for x
    x = 246,673,456,505.28/620,143.20
  6. Step 6: Final answer
    x = 397,768.54

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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.