Home / 813,619.40-1,220,210.40-340,206.80

Finding the Fourth Proportional to 813,619.40, 1,220,210.40 and 340,206.80

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Solution

The fourth proportional to 813,619.40, 1,220,210.40 and 340,206.80 is: 510,218.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,619.40 : 1,220,210.40 = 340,206.80 : x
  2. Step 2: Convert to fraction form
    813,619.40/1,220,210.40 = 340,206.80/x
  3. Step 3: Cross multiply
    813,619.40x = 1,220,210.40 × 340,206.80
  4. Step 4: Simplify right side
    813,619.40x = 415,123,875,510.72
  5. Step 5: Solve for x
    x = 415,123,875,510.72/813,619.40
  6. Step 6: Final answer
    x = 510,218.75

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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.