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Finding the Fourth Proportional to 638,312.61, 880,860.89 and 351,859.35

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Solution

The fourth proportional to 638,312.61, 880,860.89 and 351,859.35 is: 485,560.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,312.61 : 880,860.89 = 351,859.35 : x
  2. Step 2: Convert to fraction form
    638,312.61/880,860.89 = 351,859.35/x
  3. Step 3: Cross multiply
    638,312.61x = 880,860.89 × 351,859.35
  4. Step 4: Simplify right side
    638,312.61x = 309,939,144,378.70
  5. Step 5: Solve for x
    x = 309,939,144,378.70/638,312.61
  6. Step 6: Final answer
    x = 485,560.11

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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.