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Finding the Fourth Proportional to 418,558.12, 623,894.23 and 384,965.80

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Solution

The fourth proportional to 418,558.12, 623,894.23 and 384,965.80 is: 573,822.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,558.12 : 623,894.23 = 384,965.80 : x
  2. Step 2: Convert to fraction form
    418,558.12/623,894.23 = 384,965.80/x
  3. Step 3: Cross multiply
    418,558.12x = 623,894.23 × 384,965.80
  4. Step 4: Simplify right side
    418,558.12x = 240,177,941,367.33
  5. Step 5: Solve for x
    x = 240,177,941,367.33/418,558.12
  6. Step 6: Final answer
    x = 573,822.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.