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Finding the Fourth Proportional to 632,381.40, 873,142.74 and 390,994.92

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Solution

The fourth proportional to 632,381.40, 873,142.74 and 390,994.92 is: 539,855.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    632,381.40 : 873,142.74 = 390,994.92 : x
  2. Step 2: Convert to fraction form
    632,381.40/873,142.74 = 390,994.92/x
  3. Step 3: Cross multiply
    632,381.40x = 873,142.74 × 390,994.92
  4. Step 4: Simplify right side
    632,381.40x = 341,394,375,774.88
  5. Step 5: Solve for x
    x = 341,394,375,774.88/632,381.40
  6. Step 6: Final answer
    x = 539,855.18

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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.