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Finding the Fourth Proportional to 641,716.89, 885,575.87 and 355,230.83

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Solution

The fourth proportional to 641,716.89, 885,575.87 and 355,230.83 is: 490,222.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,716.89 : 885,575.87 = 355,230.83 : x
  2. Step 2: Convert to fraction form
    641,716.89/885,575.87 = 355,230.83/x
  3. Step 3: Cross multiply
    641,716.89x = 885,575.87 × 355,230.83
  4. Step 4: Simplify right side
    641,716.89x = 314,583,851,328.07
  5. Step 5: Solve for x
    x = 314,583,851,328.07/641,716.89
  6. Step 6: Final answer
    x = 490,222.18

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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.