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Finding the Fourth Proportional to 429,991.65, 645,479.55 and 252,598.61

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Solution

The fourth proportional to 429,991.65, 645,479.55 and 252,598.61 is: 379,186.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,991.65 : 645,479.55 = 252,598.61 : x
  2. Step 2: Convert to fraction form
    429,991.65/645,479.55 = 252,598.61/x
  3. Step 3: Cross multiply
    429,991.65x = 645,479.55 × 252,598.61
  4. Step 4: Simplify right side
    429,991.65x = 163,047,238,727.12
  5. Step 5: Solve for x
    x = 163,047,238,727.12/429,991.65
  6. Step 6: Final answer
    x = 379,186.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.