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Finding the Fourth Proportional to 642,448.80, 886,578.48 and 355,987.44

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Solution

The fourth proportional to 642,448.80, 886,578.48 and 355,987.44 is: 491,262.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,448.80 : 886,578.48 = 355,987.44 : x
  2. Step 2: Convert to fraction form
    642,448.80/886,578.48 = 355,987.44/x
  3. Step 3: Cross multiply
    642,448.80x = 886,578.48 × 355,987.44
  4. Step 4: Simplify right side
    642,448.80x = 315,610,803,454.29
  5. Step 5: Solve for x
    x = 315,610,803,454.29/642,448.80
  6. Step 6: Final answer
    x = 491,262.19

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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.