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Finding the Fourth Proportional to 391,307.08, 540,004.02 and 221,541.40

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Solution

The fourth proportional to 391,307.08, 540,004.02 and 221,541.40 is: 305,727.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,307.08 : 540,004.02 = 221,541.40 : x
  2. Step 2: Convert to fraction form
    391,307.08/540,004.02 = 221,541.40/x
  3. Step 3: Cross multiply
    391,307.08x = 540,004.02 × 221,541.40
  4. Step 4: Simplify right side
    391,307.08x = 119,633,246,596.43
  5. Step 5: Solve for x
    x = 119,633,246,596.43/391,307.08
  6. Step 6: Final answer
    x = 305,727.27

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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.