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Finding the Fourth Proportional to 402,724.88, 555,762.41 and 221,448.55

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Solution

The fourth proportional to 402,724.88, 555,762.41 and 221,448.55 is: 305,600.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,724.88 : 555,762.41 = 221,448.55 : x
  2. Step 2: Convert to fraction form
    402,724.88/555,762.41 = 221,448.55/x
  3. Step 3: Cross multiply
    402,724.88x = 555,762.41 × 221,448.55
  4. Step 4: Simplify right side
    402,724.88x = 123,072,780,460.49
  5. Step 5: Solve for x
    x = 123,072,780,460.49/402,724.88
  6. Step 6: Final answer
    x = 305,600.14

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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.