Home / 920,136.80-1,380,248.40-289,071.20

Finding the Fourth Proportional to 920,136.80, 1,380,248.40 and 289,071.20

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Solution

The fourth proportional to 920,136.80, 1,380,248.40 and 289,071.20 is: 433,620.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,136.80 : 1,380,248.40 = 289,071.20 : x
  2. Step 2: Convert to fraction form
    920,136.80/1,380,248.40 = 289,071.20/x
  3. Step 3: Cross multiply
    920,136.80x = 1,380,248.40 × 289,071.20
  4. Step 4: Simplify right side
    920,136.80x = 398,990,061,286.08
  5. Step 5: Solve for x
    x = 398,990,061,286.08/920,136.80
  6. Step 6: Final answer
    x = 433,620.37

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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.