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Finding the Fourth Proportional to 621,381.04, 857,497.72 and 349,448.88

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Solution

The fourth proportional to 621,381.04, 857,497.72 and 349,448.88 is: 482,234.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,381.04 : 857,497.72 = 349,448.88 : x
  2. Step 2: Convert to fraction form
    621,381.04/857,497.72 = 349,448.88/x
  3. Step 3: Cross multiply
    621,381.04x = 857,497.72 × 349,448.88
  4. Step 4: Simplify right side
    621,381.04x = 299,651,617,856.55
  5. Step 5: Solve for x
    x = 299,651,617,856.55/621,381.04
  6. Step 6: Final answer
    x = 482,234.89

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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.