Home / 620,821.40-931,232.10-200,139.80

Finding the Fourth Proportional to 620,821.40, 931,232.10 and 200,139.80

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Solution

The fourth proportional to 620,821.40, 931,232.10 and 200,139.80 is: 300,209.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,821.40 : 931,232.10 = 200,139.80 : x
  2. Step 2: Convert to fraction form
    620,821.40/931,232.10 = 200,139.80/x
  3. Step 3: Cross multiply
    620,821.40x = 931,232.10 × 200,139.80
  4. Step 4: Simplify right side
    620,821.40x = 186,376,606,247.58
  5. Step 5: Solve for x
    x = 186,376,606,247.58/620,821.40
  6. Step 6: Final answer
    x = 300,209.70

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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.