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Finding the Fourth Proportional to 391,632.04, 540,431.04 and 221,862.52

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Solution

The fourth proportional to 391,632.04, 540,431.04 and 221,862.52 is: 306,158.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,632.04 : 540,431.04 = 221,862.52 : x
  2. Step 2: Convert to fraction form
    391,632.04/540,431.04 = 221,862.52/x
  3. Step 3: Cross multiply
    391,632.04x = 540,431.04 × 221,862.52
  4. Step 4: Simplify right side
    391,632.04x = 119,901,392,420.62
  5. Step 5: Solve for x
    x = 119,901,392,420.62/391,632.04
  6. Step 6: Final answer
    x = 306,158.28

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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.