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Finding the Fourth Proportional to 621,690.12, 857,897.28 and 349,769.52

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Solution

The fourth proportional to 621,690.12, 857,897.28 and 349,769.52 is: 482,662.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,690.12 : 857,897.28 = 349,769.52 : x
  2. Step 2: Convert to fraction form
    621,690.12/857,897.28 = 349,769.52/x
  3. Step 3: Cross multiply
    621,690.12x = 857,897.28 × 349,769.52
  4. Step 4: Simplify right side
    621,690.12x = 300,066,319,834.91
  5. Step 5: Solve for x
    x = 300,066,319,834.91/621,690.12
  6. Step 6: Final answer
    x = 482,662.20

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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.