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Finding the Fourth Proportional to 642,130.48, 886,131.12 and 370,198.90

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Solution

The fourth proportional to 642,130.48, 886,131.12 and 370,198.90 is: 510,869.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,130.48 : 886,131.12 = 370,198.90 : x
  2. Step 2: Convert to fraction form
    642,130.48/886,131.12 = 370,198.90/x
  3. Step 3: Cross multiply
    642,130.48x = 886,131.12 × 370,198.90
  4. Step 4: Simplify right side
    642,130.48x = 328,044,765,879.77
  5. Step 5: Solve for x
    x = 328,044,765,879.77/642,130.48
  6. Step 6: Final answer
    x = 510,869.33

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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.