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Finding the Fourth Proportional to 641,858.69, 885,792.67 and 355,378.77

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Solution

The fourth proportional to 641,858.69, 885,792.67 and 355,378.77 is: 490,438.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,858.69 : 885,792.67 = 355,378.77 : x
  2. Step 2: Convert to fraction form
    641,858.69/885,792.67 = 355,378.77/x
  3. Step 3: Cross multiply
    641,858.69x = 885,792.67 × 355,378.77
  4. Step 4: Simplify right side
    641,858.69x = 314,791,904,885.22
  5. Step 5: Solve for x
    x = 314,791,904,885.22/641,858.69
  6. Step 6: Final answer
    x = 490,438.02

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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.