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Finding the Fourth Proportional to 346,780.40, 520,170.60 and 213,810.80

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Solution

The fourth proportional to 346,780.40, 520,170.60 and 213,810.80 is: 320,716.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,780.40 : 520,170.60 = 213,810.80 : x
  2. Step 2: Convert to fraction form
    346,780.40/520,170.60 = 213,810.80/x
  3. Step 3: Cross multiply
    346,780.40x = 520,170.60 × 213,810.80
  4. Step 4: Simplify right side
    346,780.40x = 111,218,092,122.48
  5. Step 5: Solve for x
    x = 111,218,092,122.48/346,780.40
  6. Step 6: Final answer
    x = 320,716.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.