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Finding the Fourth Proportional to 402,902.53, 555,993.89 and 221,614.45

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Solution

The fourth proportional to 402,902.53, 555,993.89 and 221,614.45 is: 305,821.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,902.53 : 555,993.89 = 221,614.45 : x
  2. Step 2: Convert to fraction form
    402,902.53/555,993.89 = 221,614.45/x
  3. Step 3: Cross multiply
    402,902.53x = 555,993.89 × 221,614.45
  4. Step 4: Simplify right side
    402,902.53x = 123,216,280,135.71
  5. Step 5: Solve for x
    x = 123,216,280,135.71/402,902.53
  6. Step 6: Final answer
    x = 305,821.56

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1.5x scale

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.