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Finding the Fourth Proportional to 642,290.43, 886,348.94 and 355,804.23

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Solution

The fourth proportional to 642,290.43, 886,348.94 and 355,804.23 is: 491,003.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,290.43 : 886,348.94 = 355,804.23 : x
  2. Step 2: Convert to fraction form
    642,290.43/886,348.94 = 355,804.23/x
  3. Step 3: Cross multiply
    642,290.43x = 886,348.94 × 355,804.23
  4. Step 4: Simplify right side
    642,290.43x = 315,366,700,329.00
  5. Step 5: Solve for x
    x = 315,366,700,329.00/642,290.43
  6. Step 6: Final answer
    x = 491,003.27

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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.