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Finding the Fourth Proportional to 621,368.07, 857,479.77 and 349,435.89

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Solution

The fourth proportional to 621,368.07, 857,479.77 and 349,435.89 is: 482,216.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,368.07 : 857,479.77 = 349,435.89 : x
  2. Step 2: Convert to fraction form
    621,368.07/857,479.77 = 349,435.89/x
  3. Step 3: Cross multiply
    621,368.07x = 857,479.77 × 349,435.89
  4. Step 4: Simplify right side
    621,368.07x = 299,634,206,586.95
  5. Step 5: Solve for x
    x = 299,634,206,586.95/621,368.07
  6. Step 6: Final answer
    x = 482,216.94

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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.