Home / 813,406.40-1,220,302.80-280,931.84

Finding the Fourth Proportional to 813,406.40, 1,220,302.80 and 280,931.84

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Solution

The fourth proportional to 813,406.40, 1,220,302.80 and 280,931.84 is: 421,464.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,406.40 : 1,220,302.80 = 280,931.84 : x
  2. Step 2: Convert to fraction form
    813,406.40/1,220,302.80 = 280,931.84/x
  3. Step 3: Cross multiply
    813,406.40x = 1,220,302.80 × 280,931.84
  4. Step 4: Simplify right side
    813,406.40x = 342,821,910,961.15
  5. Step 5: Solve for x
    x = 342,821,910,961.15/813,406.40
  6. Step 6: Final answer
    x = 421,464.49

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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.